Columbia subject headings:
Harvard subject headings:
Cetacea--Canada, Eastern--Identification.
Cetacea--Maine, Gulf of--Identification.
Seals (Animals)--Canada, Eastern--Identification.
Seals (Animals)--Maine, Gulf of--Identification.
Princeton subject headings:
Cetacea--Canada, Eastern--Identification.
Cetacea--Maine, Gulf of--Identification.
Seals (Animals)--Canada, Eastern--Identification.
Seals (Animals)--Maine, Gulf of--Identification.