TY  - BOOK
AU  - Harker,Alfred
ED  - University Press
TI  - Petrology for students: an introduction to the study of rocks under the microscope 
U1  - 552.07 22nd ed.
PY  - 1954///.
CY  - Cambridge: 
PB  - University Press, 
KW  - Petrology
N1  - First edition 1895; Includes bibliographical references (p. viii) and index (p. 279-283)
ER  -