Olaf A. Hougen, Kenneth M. Watson, Roland A. Ragatz. <br/><br/>
Chemical Process Principles: Material and Energy Balances, Part-1 / 
Olaf A. Hougen 
 - 2nd edition 
 - PHOTO COPY  PHOTO COPY  1956 
 - 504P 
<br/><br/><label>Dewey Class. No.: </label>660 H 853 C