[Hans Lehfeldt--a pioneer in family planning in Europe and America].
Neumann
H G
HG
Abteilung Familienplanung, Wilhelm-Pieck-Universität Rostock.
D005193:Family Planning Services / Q000266:history*; D005260:Female; D005858:Germany; D049673:History, 20th Century; D006801:Humans; D008297:Male; D014481:United States
Hans Lehfeldt--Pionier der Familienplanung in Europa und Amerika.