Kobayashi 1968. The Cretaceous non-marine Pelecypods from the Nam Phung Dam site in the northeastern part of the Khorat Plateau, Thailand with a note on the Trigonioididae. Kobayashi, T.; Toriyama, R.[Eds]. Geology and Palaeontology of southeast Asia 4., Geology and Palaeontology of southeast Asia 4. Univ. Tokyo Press, Tokyo., 1968: 109-138. Chapter pagination: 109-138