Chemical process principles charts : part I ; material energy balances / Olaf A. Hougen, Kenneth M. Watson and Roland A. Ragatz. Hougen, Olaf A. (Olaf Andreas), 1893- Watson, Kenneth M. Ragatz, Roland A. Chemical engineering. Chemistry, Physical and theoretical. TP155 .H652 1960 541.369 HOC Includes index New Delhi : CBS Publishers , 1995. 1995. 1960 Text xiv, 504 p. : eng