TY  - BOOK
ED  - United States.
TI  - Stratigraphic notes, 1989-1990: four short papers propose changes in stratigraphic nomenclature in Oregon,Vermont, Massachusetts and southern Pakistan
U1  - 551.700973 
PY  - 1991///
CY  - Washington, D.C.
PB  - United States Government Printing Office
KW  - Geology, Stratigraphic
ER  -