{"id":"000489679","type":"article","title":"In memoriam Professor Dr. J.J. Koopmans","pages":"50-51","container-title":"Phoenix. Bulletin uitgegeven door het Vooraziatisch-Egyptisch Genootschap \"Ex Oriente lux\", 9.1963-66","author":[{"family":"Lettinga","given":"J.P."}],"issued":{"raw":"1963"}}