TY  - BOOK
AU  - Sivertsen,Erling
TI  - A Survey of the Eared Seals (family Otariidae) with Remarks on the Antartic Seals Collected by M/K "Norvegia" in 1928-1929
T2  - Det Norske Videnskps Akademi i Oslo ; 
PY  - 1954///
CY  - Oslo : 
PB  - Jacob Dybward, 
ER  -