Standard catalogue of air post stamps /
compiled and edited by Nicolas Sanabria and Harry M. Konwiser.
APA Citation
Konwiser, H. Myron., Sanabria, N. Standard catalogue of air post stamps. New York: Nicolas Sanabria, Inc.
MLA Citation
Konwiser, Harry Myron, 1879-, and Nicolas Sanabria. Standard Catalogue of Air Post Stamps. New York: Nicolas Sanabria, Inc,
Warning: These citations may not always be complete (especially for serials).