共 4 条
[1]
POPULATION-DYNAMICS AND MARINE MAMMAL MANAGEMENT POLICIES
[J].
JOURNAL OF THE FISHERIES RESEARCH BOARD OF CANADA,
1977, 34 (02)
:183-190
[2]
Laws Richard M., 1975, ELEPHANTS THEIR HABI
[3]
REPRODUCTIVE RATES OF HARP SEALS PAGOPHILUS GROENLANDICUS (ERXLEBEN)
[J].
JOURNAL OF THE FISHERIES RESEARCH BOARD OF CANADA,
1966, 23 (05)
:757-&
[4]
Snedecor G.W., 1980, STAT METHODS