TY  - JOUR
A1  - Cope, E. D.
JO  - Proceedings of the Academy of Natural Sciences of Philadelphia
SP  - 1876:129
EP  - 139.
C1  - 1876:129–139.
TI  - Fourth contribution to the history of the existing Cetacea.
UR  - https://marinespecies.org/cetacea/aphia.php?p=sourcedetails&id=425991
PY  - 1876
Y2  - 2026-07-16
ER  -