TY  - RPRT
TI  - Middle Pennsylvanian plant fossils: Problematic occurrence in the Bronx
AU  - E-an Zen
AU  - S.H. Mamay
PY  - 1968
DO  - 10.1126/science.161.3837.157
UR  - https://pubs.usgs.gov/publication/70011521
ID  - 70011521
ER  -