Title: OCLC
Content:  OCLC assigns a unique control number (referred to as an "OCN" for "OCLC Control Number") to each new bibliographic record in the WorldCat. Numbers are assigned serially, and as of mid-2013 over a billion OCNs had been created. In September 2013, the OCLC declared these numbers to be in the public domain, removing a perceived barrier to widespread use of OCNs outside OCLC itself. The control numbers link WorldCat's records to local library system records by providing a common reference key for a record across libraries. OCNs are particularly useful as identifiers for books and other bibliographic materials that do not have ISBNs 
Title: OpenSIGLE
Content:  on Grey Literature held in Washington D.C. on November 2–3, 1995 were added in March 2010. GreyNet purchased permission last year from Emerald to make openly accessible the papers published in the GL Conference Proceedings from 1994 to 2000. These earlier collections are added to the more recent collections in the OpenSIGLE Repository. The work involved relies on the efforts of INIST-CNRS as service provider and GreyNet as data provider. By autumn 2010, it is anticipated that all of the papers in the International Conference Series on Grey Literature will be fully accessible via the OpenSIGLE Repository. OpenSIGLE participates in the WorldWideScience global science gateway.
Title: OCLC
Content:  books published before 1970). OCNs are used as identifiers often in Wikipedia and Wikidata. In October 2013, it was reported that out of 29,673 instances of book infoboxes in Wikipedia, "there were 23,304 ISBNs and 15,226 OCNs", and regarding Wikidata: "of around 14 million Wikidata items, 28,741 were books. 5403 Wikidata items have an ISBN associated with them, and 12,262 have OCNs." OCLC also runs the Virtual International Authority File (VIAF), an international name authority file, with oversight from the VIAF Council composed of representatives of institutions that contribute data to VIAF. VIAF numbers are broadly used as standard identifiers, including in Wikipedia.
Title: Palomar Observatory
Content: OCLC 1093049 ; ISBN: 9781846282171; ISBN: 9781846282164 OCLC 299995003 ; OCLC 6327013 
Title: Grey Literature Network Service
Content:  are welcome and will be indexed in GreySource. GreyText is an inhouse archive of documents on grey literature. Over 125 documents are indexed by first author followed by the title, source, date of publication and length in printed pages. Free Access to the first page of each document is available for browsing. Also, in most cases the corresponding PowerPoint is online available. The full-text of all documents listed in GreyText are accessible in PDF via email on demand. IDGL, International Directory of Organizations in Grey Literature provides a list of some 170 organizations in more than 30 countries worldwide that are currently associated with GreyNet either via partnership, 
Title: Alasdair Gray
Content: A Gray Play Book (2009), ISBN: 978-1-906307-91-2 ; Fleck (2011), ISBN: 978-1-906120-37-5 
Title: Grey Literature Network Service
Content:  sponsorship, or authorship in the field of grey literature. Entries are alphabetical by country and each entry has an embedded link to the corresponding organization's website. GreyNet International is proud in serving the grey literature community and welcomes additions and revisions to this Directory. WHOIS in the Field of Grey Literature is a compilation of over 350 biographical notes provided by authors in the International Conference Series on Grey Literature and The Grey Journal. This online resource is maintained by TextRelease, the Program and Conference Bureau. Records in this directory appear in alphabetical order by last name of author and each record contains a current email address.
Title: OCLC
Content:  OCLC, Inc., doing business as OCLC, is an American nonprofit cooperative organization "dedicated to the public purposes of furthering access to the world's information and reducing information costs". It was founded in 1967 as the Ohio College Library Center, then became the Online Computer Library Center as it expanded. In 2017, the name was formally changed to OCLC, Inc. OCLC and its member libraries cooperatively produce and maintain WorldCat, the largest online public access catalog (OPAC) in the world. OCLC is funded mainly by the fees that libraries pay (around $200 million annually in total ) for the many different services it offers. OCLC also maintains the Dewey Decimal Classification system.
Title: Aqueous Wastes from Petroleum and Petrochemical Plants
Content:  The book became a classic in its field and is available in major university, public and industrial libraries worldwide. The book has no ISBN because they were not in use in 1967. The Library of Congress catalog number (LCCN) is 67019834 and the British Library system number is 012759691. It is no longer in print, but photocopies can be obtained from the ProQuest Company's Books On Demand service.
Title: Grey Crawford
Content: Finding Bones, Published by Kehrer Verlag, Heidelberg 2017, Introduction by Timothy Persons, Essay by Lyle Rexer. ; El Mirage, Published by Hatje Cantz, Berlin 2018, Introduction by Timothy Persons, Essay by Lyle Rexer. 

Question: Verify the following claims with "True" or "False": Well the OCLC number of A Fortress of Grey Ice is 51969173.
Answer: True