TY  - BOOK
AU  - Harker, Alfred.
TI  - Petrology for students, an introduction to the study of roks under the microscope
U1  - 552.8 
PY  - 1935///
CY  - Cambridge
PB  - University Press
KW  - Petrología
N1  - Ejs. desc. en bodega
ER  -