A half century of economic progress, 1890-1940 - Ludewig, Charles Keech, 1906-; Zier, Julian Gilbert., 1903-; Kelbaugh, Paul Recker, 1903- (Washington, D.C., Pan American union, 1940)
A half century of Latin American agriculture, by P. R. Kelbaugh.--A half century of Latin American commerce, by J. G. Zier.--Industrialization in the republics of Latin America, by C. K. Ludewig.
Cover title.
At head of title: Pan American day, April 14.
Mimeographed.
Keywords: Agriculture -- Latin America; Industries -- Latin America; Latin America -- Commerce