TY  - BOOK
AU  - Betz Frederick Ed.
TI  - Environmental geology
T2  - Benchmark papers in geology; 25
U1  - H0aY:(G:55)z7, L5-;1 
PY  - 1975///
CY  - Strovdsburg
PB  - Dowden, Eutchinson and Ross
KW  - Geology
ER  -