TY  - BOOK
AU  - Petersen, Morris S.
AU  - Rigby, J. Keith
TI  - HISTORICAL GEOLOGY, LABORATORY MANUAL
U1  - 551.7 
PY  - 1969///
CY  - Dubuque
PB  - W. C. Brown
KW  - Geology, Stratigraphic -- Laboratory Manuals
ER  -