Gaur, sci / 
Gaur, S.C.I. 
 -- Zarauz :   Icharopena,   D.L. 1971 
 - 31p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Sociedad
<br/><br/><label>Universal Decimal Class. No.: </label>316.3