by Gordon F. Bloom, F. Marion Fletcher, Charles R. Perry
Industrial Research Unit, Wharton School of Finance and Commerce, University of Pennsylvaniac1972Studies of Negro employment
v. 6 , Major Industrial Research Unit studies
no. 51
Industrial Research Unit, Wharton School of Finance and Commerce, University of Pennsylvaniac1971Studies of Negro employment
v. 5 , Major Industrial Research Unit studies
no. 50
Industrial Research Unit, Wharton School of Finance and Commerce, University of Pennsylvania[c1970]Studies of Negro employment
v. 3 , Major Industrial Research Unit studies
no. 48
Industrial Research Unit, Wharton School of Finance and Commerce, University of Pennsylvaniac1970Studies of Negro employment
v. 1 , Major Industrial Research Unit studies
no. 46
