TY  - BOOK
AU  - Brown,George D.
AU  - Ladd,George T.
TI  - Excursions in geology: a modular program for physical geology 
SN  - 0395167337
PY  - 1973///
CY  - Boston, Mass.
PB  - Houghton Mifflin
KW  - Geology
KW  - Study and teaching (Higher)
KW  - Laboratory manuals
ER  -