Jongkonnee Khanmanee และ Phisit Limtrakun. (2009) Origin of basalt breccia,Ban sap sawat,Wichian buri disttrict, Phetchabun province /. Chiang Mai University,:ม.ป.ท.Jongkonnee Khanmanee และ Phisit Limtrakun. 2009. Origin of basalt breccia,Ban sap sawat,Wichian buri disttrict, Phetchabun province /. ม.ป.ท.:Chiang Mai University,;Jongkonnee Khanmanee และ Phisit Limtrakun. Origin of basalt breccia,Ban sap sawat,Wichian buri disttrict, Phetchabun province /. ม.ป.ท.:Chiang Mai University, 2009. Print.