Acta Agrestia Sinica
Studies on Climatic Suitability for Harvesting and Curing Alfalfa Hay in the Beijing Area
WANG Cheng-jie, ZHOU He, WANG Shi-ping
. 2004, (4): 281 -284 .  DOI: 10.11733/j.issn.1007-0435.2004.04.006