ZHANG, Shouyue (1993): Grand caves of China.-
Proceedings XI Intern. Congress of Speleology, 2nd-8th August 1993, Beijing 1993: 236-237 (3 tab.) (chines. summ.).
Lists 21 caves with more than 200 m in elevation (Zhaidong -552 m; Gebihe -445 m, Wuajidong -430 m etc.); and 19 caves with more than 4,8 km in length (Tenglongdong 33,52 km; Duobingdong 17,2 km; Baimodong 13,7 km etc.). (RB).
Source : BBS
JIAN, Chen (1990) : Caves in China.-
NSS News vol. 48(2) : 43.
A list of 29 caves more than 2 km long.Tenglong dong (Hubei) 32, 0 km; Baishui gond(Guizhou) 22, 45 km; Duobing dong (Guizhou) 17, 21 km; Baimo dong (Guangxi) 15, 70 km etc. (RB)
Source : BBS