Popov, Lev A. (Fiskeridirektoratets skrifter, Serie Havundersøkelser, Research report, 1971)
In 1960-1968, 2 705 harp seal pups and 55 adult female harp seals were tagged
in the White Sea. At Newfoundland 79 harp seal pups were tagged in 1963, and in
the Jan Mayen area of the Greenland Sea 50 hooded seal pups ...