Air mail payment and the government.
Spencer, Francis A.
Air mail payment and the government. - Washington, D.C. Brookings Institution 1941. - xii 402 p. illus. - Publication / Institute of Economics of the Brookings Institution no. 87 . - Publication (Brookings Institution. Institute of Economics) no. 87. .
91050791
Air mail service--U.S.
Aeronautics, Commercial--U.S.
Microfilm 88/3405 (H)
Air mail payment and the government. - Washington, D.C. Brookings Institution 1941. - xii 402 p. illus. - Publication / Institute of Economics of the Brookings Institution no. 87 . - Publication (Brookings Institution. Institute of Economics) no. 87. .
91050791
Air mail service--U.S.
Aeronautics, Commercial--U.S.
Microfilm 88/3405 (H)