共 20 条
[11]
MYERS PF, 1970, DEMOGRAPHIC TRENDS E, P68
[12]
NOVAK F, 1969, 6 C EUR E REG INT PL
[13]
Potts M, 1967, Eugen Rev, V59, P232
[14]
SADVOKASOVA EA, 1969, SOCIO HYGIENIC ASPEC
[15]
TIETZE C, 1969, 1969 INT FAM C DACC
[16]
*UN, 1969, DEMOGRAPHIC YB
[17]
*US DEP HEW SOC SE, 1969, 31 RES REP
[18]
*WHO, 1968, WORLD HEALTH STAT AN
[19]
1968, MUNCA 1027, P2
[20]
1967, INT DIGEST HEALTH LE, V18, P822