{"id":"000987128","type":"book","title":"A tale of the unexpected: neolithic shaft mines at Valkenburg aan de Geul (Limburg, The Netherlands)","publisher":"Institute of Prehistory","publisher-place":"Leiden","pages":"189-223","container-title":"The end of our third decade. Papers written on the occasion of the 30th anniversary of the Institute of Prehistory. 1","author":[{"family":"Brounen","given":"F. T. S."}],"issued":{"raw":"1992"}}