title: [In memoriam Wilhelm Tönnis, 16 June 1898 - 12. September 1978].
mesh_terms: D005858:Germany; D005859:Germany, East; D049673:History, 20th Century; D009493:Neurosurgery / Q000266:history
vernacular_title: Wilhelm Tönnis 16. 6 1898 - 12. 9. 1978.