TY  - BOOK
AU  - Pirsson , Louis V
AU  - Knoph , Adolph ,ed.
TI  - Rocks and rock minerals
U1  - 551.3/PIR 
PY  - 1946///]
CY  - New York
PB  - John Willey
KW  - Geology
KW  - Geology , Hydrology , Meteorology - Surface  and exogenous processes and their agents
N1  - Fourth printing 1949
ER  -