Hewitt, William <br/><br/>
Microbiological assay  an introduction to quantitative principles and evaluation 

 - Academic Press, New York  1977 
 - xiii,284p 
<br/><br/><label>ISBN: </label>0-12-346450-1 
<br/><br/><label>Dewey Class. No.: </label>615.19018 Hew