Harker, Alfred <br/><br/>
Petrology for students : an introduction to the study of rocks under the microscope. 

 - Cambridge :  Cambridge University press,  1923. 
 - 302 p. :  diagr. 
 - Cambridge geological series .
 - Cambridge geological series .
<br/><br/> Bibliografía y notas de pie de página 
<br/><br/><label>Subjects--Topical Terms: </label><br/>PETROLOGIA
<br/><br/><label>Universal Decimal Class. No.: </label>552.1