Chemical engineering in practice : a collection of papers originally presented in Philadelphia, Pa., May 12, 1953, under the auspices of the Philadelphia-Wilmington Section of the American Institute of Chemical Engineers and the Department of Chemical Engineering, University of Pennsylvania. / Edited by Harper, James I. Chemical engineering. TP185 .A5 1953 660.28 HAC Includes bibliographical references. New York : Reinhold Pub., c1954. c1954. 1954 Text viii, 140 p. : eng