title: [First evidence of the biological effect of radium rays--a further contribution of Otto Walkhoff].
mesh_terms: D005858:Germany; D049672:History, 19th Century; D049673:History, 20th Century; D011861:Radiography, Dental / Q000266:history*; D011883:Radium / Q000266:history*
chemical_list: D011883:Radium
vernacular_title: Der erste Nachweis der biologischen Wirksamkeit der Radiumstrahlen--ein weiteres Verdienst Otto Walkhoffs.