{"id":"000027780","type":"book","title":"Certain critical stages in the evolution of the vertebrate jaws. - St. Louis, MO","container-title":"The international journal of orthodontia, oral surgery and radiography ; 17.1931, no. 12, S. 1-12 : 6 Ill","author":[{"family":"Gregory","given":"William K."}],"issued":{"raw":"1931"}}