Ōratsʻuytsʻi patmutʻyun
By: H.S. Badalyan.
Publisher: Haykakan SSH GA hratarakchʻutʻyun
Published: 1970
Place of publication: Erevan
Language: arm
Number of pages: 559
Subjects: Calendars -- History.
Other titles: Istorii͡a︡ kalendari͡a︡
Notes: In Armenian; with summaries in English and Russian.
Includes bibliographical references (p. 547-548) and indexes.
At head of title: Haykakan SSH Gitutʻyunneri akademia, Bnagitutʻyan ev tekhnikayi patmutʻyan khorhurd.