Classification : Class Q : Science / E. U. Library of Congress Subject Cataloging Division. 

 - 6 
 - Washington :  Library of Congress,  1973. 
 - 415 p. 
<br/><br/> Monografía 
<br/><br/><label>ISBN: </label>0844400750 
<br/><br/><label>Subjects--Index Terms: </label>Clasificación - Libros - Ciencia 
<br/><br/><label>LC Class. No.: </label>C/Z696/U5Q3 1973