TY  - RPRT
TI  - Stratigraphic notes, 1989-90: Four short papers propose changes in stratigraphic nomenclature in Oregon, Vermont, Massachusetts, and southern Pakistan
AU  - Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey
PY  - 1991
DO  - 10.3133/b1935
UR  - https://pubs.usgs.gov/publication/b1935
ID  - b1935
ER  -