Barger, Harold
The transportation industries 1889-1946 a study of output employment, and productivity / by Harold Barger .-- New York : National Bureau of Economic Research , 1951
.--XVI, 288 p. 24 cm .-- ( National Bureau of Economic Research ; ,51 ).
TRANSPORTES
TRABAJO
PRODUCTIVIDAD
ESTADOS UNIDOS
HISTORIA
National Bureau of Economic Research
The transportation industries 1889-1946 a study of output employment, and productivity / by Harold Barger .-- New York : National Bureau of Economic Research , 1951
.--XVI, 288 p. 24 cm .-- ( National Bureau of Economic Research ; ,51 ).
TRANSPORTES
TRABAJO
PRODUCTIVIDAD
ESTADOS UNIDOS
HISTORIA
National Bureau of Economic Research