Northrup, Herbert R. (Herbert Roof), 1918-2007.
Philadelphia : Industrial Research Unit, Dept. of Industry, Wharton School of Finance and Commerce, University of Pennsylvania; distributed by University of Pennsylvania Press, [1971]
Purcell, Theodore Vincent, 1911-
Philadelphia : Industrial Research Unit, Wharton School of Finance and Commerce, University of Pennsylvania; distributed by University of Pennsylvania Press, [1971]
Ozanne, Robert W.
Philadelphia : Industrial Research Unit, Wharton School of Finance and Commerce, University of Pennsylvania; distributed by University of Pennsylvania Press, [1972]
Koziara, Edward Clifford.
Philadelphia : Industrial Research Unit, Wharton School of Finance and Commerce, University of Pennsylvania; distributed by University of Pennsylvania Press, [1968]
Risher, Howard W.
Philadelphia : Industrial Research Unit, Wharton School of Finance and Commerce, University of Pennsylvania; distributed by University of Pennsylvania, [1971]
Bloom, Gordon F. (Gordon Falk), 1918-2014.
Philadelphia : Industrial Research Unit, Wharton School of Finance and Commerce, University of Pennsylvania; distributed by University of Pennsylvania Press, [1972]
Rowan, Richard L.
Philadelphia : Industrial Research Unit, Wharton School of Finance and Commerce, University of Pennsylvania; distributed by University of Pennsylvania Press, [1970]
Leone, Richard D.
[Philadelphia] : Industrial Research Unit, Wharton School of Finance and Commerce, University of Pennsylvania; distributed by University of Pennsylvania Press, [1970]
