Williams, Howel <br/><br/>
Petrography :  an introduction to the study of rocks in thin sections. 

 - San Francisco :  W.H.Freeman and Company,  1954. 
 - 406 p. :  il. ;  22,5 cm 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Petrografía<br/>Roca ígnea<br/>Roca metamórfica<br/>Roca sedimentaria
<br/><br/><label>Index Terms--Genre/Form: </label><br/>Libro
<br/><br/><label>Universal Decimal Class. No.: </label>552.1