McGraw-Hill encyclopedia of science & technology   : an international reference work, Vol.20 

 - 7th ed. 
 - New York   : McGraw-Hill,  1992 
 - 636p.   : ill.   ; 29cm. 
<br/><br/>Includes index 
<br/><br/><label>ISBN: </label>0-07-909206-3 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Science, <br/>Technology, <br/>Encyclopedias
<br/><br/><label>LC Class. No.: </label>REF Q121.M3 1992 Vol.20