TY  - RPRT
TI  - The lower Ordovician gastropod Ceratopea
AU  - E. L. Yochelson
AU  - Josiah Bridge
PY  - 1957
DO  - 10.3133/pp294h
UR  - https://pubs.usgs.gov/publication/pp294H
ID  - pp294H
ER  -