TY  - BOOK
AU  - Betz,Frederick,Jr
TI  - Environment geology
T2  - Benchmark papers in geology
PY  - 1975///
CY  - Pennsylvania - EEUU
PB  - Hutchinson and Ross
KW  - Geologia ambiental
KW  - Geomorfologia
KW  - Topografia del globo
KW  - Geologia
ER  -