Developments in inter-American transportation and communications, 1890-1940 - Ludewig, Charles Keech, 1906-; Zier, Julian Gilbert., 1903-; Kelbaugh, Paul Recker, 1903- (Washington, D.C., Pan American Union, 1940)
Cover title.
At head of title: Pan American day, April 14.
Mimeographed.
Keywords: Transportation -- Latin America; Communication and traffic -- Latin America; Industries -- Latin America