TY  - RPRT
TI  - Stratigraphic, paleoclimatic, and paleobiogeographic significance of Tertiary sporomorphs from Massachusetts
AU  - N. O. Frederiksen
PY  - 1984
DO  - 10.3133/pp1308
UR  - https://pubs.usgs.gov/publication/pp1308
ID  - pp1308
ER  -