title: [The sexuality theory and "theoretical biology" of Max Hartmann in the first half of the 20th century].
authors.forename: Heng-an
authors.initials: HA
authors.lastname: Chen
mesh_terms: D000818:Animals; D005075:Biological Evolution; D001695:Biology / Q000266:history*; D005858:Germany; D049673:History, 20th Century; D006801:Humans; D012723:Sex