TY  - RPRT
TI  - Upper campanian (upper cretaceous) ammonites from the Marshalltown Formation-Mount laurel boundary beds in Delaware
AU  - W. J. Kennedy
AU  - W. A. Cobban
PY  - 2016
DO  - 10.1017/s0022336000038968
UR  - https://pubs.usgs.gov/publication/70020304
ID  - 70020304
ER  -