共 22 条
[1]
CHAMBERLAIN R, 1975, BRIT BIRTHS 1970, V1
[3]
HARVEY RG, 1980, 26 NORD COUNC ARCT M, P7
[4]
JOENSEN HD, 1982, 1981 ANN REP
[5]
JOENSEN HD, 1981, 1980 ANN REP
[6]
JOENSEN HD, 1983, 1982 ANN REP
[7]
JORGENSEN P, 1981, 33 NORD COUNC ARCT M, P166
[8]
OLSEN A, 1951, VAROIN, V29, P190
[10]
SELVIN S, 1971, BRIT J PREV SOC MED, V25, P12