title: [Czechoslovak Biological Society. 50th anniversary of its foundation].
mesh_terms: D001695:Biology / Q000266:history*; D003604:Czechoslovakia; D049673:History, 20th Century; D012958:Societies, Scientific / Q000266:history*
vernacular_title: Ceskoslovenská biologická spolecnost. K padesátému výrocí zalození.