共 27 条
[11]
JENSEN S, 1976, OECD WILDLIFE SAMPLI
[13]
KOIVUSAARI J, 1972, Ornis Fennica, V49, P11
[15]
LINKO R, 1979, SAARISTOMEREN RAVINT
[17]
MAKINEN Y, 1974, TILASTOTIEDETTA BIOL
[19]
ODSJO T, 1972, AGGSKALFORTUNNING HO
[20]
POSTUPALSKY S, 1974, MANAGEMENT RAPTORS, P21