Variation of Temperature and Frost free Period in Different Time Scales in Northeast China
HU Qi，PAN Xue biao，ZHANG Dan，Yang Ning，Li Qiu yue，SHAO Chang xiu
Chinese Journal of Agrometeorology . 2015, (01): 2 -8 .  DOI: 10.3969/j.issn.1000-6362.2015.01.001