Investigation of the Old Trees of Ginkgo in Tangshan and Qinhuangdao, Hebei Province, China
ZHANG Yun-Tao YIN Xiu-Ling CUI Feng-Zhi TONG Bao-Lin LIU Jian-Jun PAN Ze-Xiang GUAN Cheng-Yao
Chinese Bulletin of Botany . 2000, (专辑): 234 -236 .