The library key
Subtitle: an aid in using books and libraries, with an appendix, Short cuts to information.
Edition: 7th ed., rev. 1948.
Publisher: H. W. Wilson Co.
Published: 1949
Place of publication: New York
Language: eng
Number of pages: 150
Subjects: Reference books.; Books and reading.
Notes: Verso of t.-p.: "Seventh edition, May, 1949."  Copyrighted 1944.