[Philadelphia] Industrial Research Unit, Wharton School of Finance and Commerce, University of Pennsylvania 1972 .
1 v. (various pagings) , Originally published as Report no. 22, 24, and 25 of Racial policies of American industry. 24 cm..
0812276566

By Bloom, Gordon Falk.
Homewood, Ill. R. D. Irwin 1969 .
xviii, 751 p. , First published in 1950 under title: Economics of labor and industrial relations.