Symbiotic associations 
edited by  P. S. Nutman and Barbara Mosse 
 - London  Cambridge Universirty Press  1963 
 - x, 356p. :ill.; 25cm. 
<br/><br/> Thirteenth symposium of the society for General Microbiology held at the Royal Institute, London April 1963   
<br/><br/><label>Dewey Class. No.: </label>576.15  / NUT