Subject: U.S. Pioneer Flights, U.S.Governmental Flights, U.S. Air Express Covers, Interrupted Flights, Airport Dedication Covers, and Mexico First Flight Covers.

Content: includes dates, descriptions and prices for some 7000 airmail flights, routes, pilots, planes and illustrations of covers, flight cachets, special postmarks and hand stamps.

Format: 517 pages, hard back, profusely illustrated.