TY  - RPRT
TI  - A further revision of the stratigraphic nomenclature of the Wissahickon Formation in Maryland
AU  - Michael W. Higgins
AU  - George Wescott Fisher
PY  - 1971
DO  - 10.1130/0016-7606(1971)82[769:afrots]2.0.co;2
UR  - https://pubs.usgs.gov/publication/70227466
ID  - 70227466
ER  -