OAT and AV2 markings
Subtitle: a work in progress
By: Murray Heifetz.
Contributors: American Air Mail Society.
Publisher: American Air Mail Society
Published: 1997
Place of publication: Mineola, N.Y
Language: eng
Number of pages: 122
Subjects: Air mail service.; Covers (Philately)
Notes: Includes bibliographical references (p. 122-123).