TY  - RPRT
TI  - Stratigraphic distribution of species of the megaspore genus Minerisporites in North America
AU  - Robert H. Tschudy
PY  - 1976
DO  - 10.3133/pp743e
UR  - https://pubs.usgs.gov/publication/pp743E
ID  - pp743E
ER  -