[Problems related to the sex ratio].
Ganevová
M
M
D000367:Age Factors; D000013:Congenital Abnormalities; D003604:Czechoslovakia; D005260:Female; D006801:Humans; D007226:Infant Mortality; D008297:Male; D012744:Sex Ratio
Príspĕvek k problematice pomĕru pohlaví.