Preface to the 50th anniversary issue.
Katayama
Yoichi
Y
D049673:History, 20th Century; D049674:History, 21st Century; D006801:Humans; D009493:Neurosurgery / Q000266:history*; D010506:Periodicals as Topic / Q000266:history*; D011643:Publishing / Q000266:history; D012955:Societies, Medical / Q000266:history*