华北地区春夏季的物候季节节奏研究

陈效逑

A STUDY OF PHENOLOGICAL SEASONAL RHYTHM IN SPRING AND SUMMER OF NORTH CHINA REGION

Chen Xiaoqiu

地理科学 . 1990, (1): 69 -76,96 . DOI: 10.13249/j.cnki.sgs.1990.01.69