Hougen, Olaf A. <br/><br/>
Chemical process principles.  Part I,  Material and energy balances / 
by Olaf A. Hougen, Kenneth M. Watson and Roland A. Ragatz. 
 - 2nd ed. 
 - New York, NY :  J. Wiley,  1943. 
 - xiv, 504 p. ;  21 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Chemical engineering.<br/>Chemistry, Physical and theoretical.