The official envelopes of state of Oman and Dhufar from 1967-1986
Subtitle: a classification of FDC and other official envelopes with notes on postal and philatelic usage
By: by Joachim Düster
Contributors: Oman Studies (Documentation center)
Series: Oman philatelic studies occasional papers -- no. 1
Publisher: Oman Studies Center
Published: 2005
Place of publication: Pforzheim
Language: eng
Number of pages: 57
Subjects: First day covers (Philately); Stamped envelopes; Postage stamps; Envelopes (Stationery)
Notes: Includes bibliographical references(p. 51-55).