Online Public Access Catalogue (OPAC)Library,Documentation and Information Science Division
“A research journal serves that narrow
borderland which separates the known from the unknown”
-P.C.Mahalanobis
338.4738 B251 47761
Barger Harold Transportation industries, 1889-1946 a study of output, employment, and productivity New York NBER 1951 xvi,288p. * Transportation industries