[Quantity and spiritual quality, present problems of the study of population and eugenics].
D005053:Eugenics; D006801:Humans; D044382:Population Groups; D013140:Spiritualism; D014798:Vital Statistics
EUGENICS; VITAL STATISTICS
Quantität und geistige Qualität, aktuelle Probleme der Bevölkerungswissenschaft und Eugenik.