"Tian yan lun" chuan bo yu qing mo min chu de she hui dong yuan =Wang Tiangen · First published 2006Open the Tome
Hebei sheng nong tian shui li wei yuan hui di san jie chang ji shuHopei, China (Province). Nong tian Shui li wei yuan hui · First published 1972Open the Tome
Chong juan di li tian ji hui yuanLinggang Gu, Shike Xu, Huaijin Nan · First published 1970Open the Tome