Excerpta medica 

 - New York:    Excerpta Medica Foundation,     1966 
 - 452p. 
 - International congress series  117 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Science
<br/><br/><label>Subjects--Index Terms: </label>Environment  
<br/><br/><label>Universal Decimal Class. No.: </label>616.89(048)  / K6