DUSAR, M.; ZHANG, Shouye (1991) : "East Yunan 1991". Geological and speleological reconnaissance of the East Yunan Karst (PR China). Preliminary results of a field trip between 17.12.1990 and 3.01.1991.-
Professional Paper (Service Géologique de Belgique), 1991/4, no248 (RV)
Source :
BBS