Journal of Hebei University of Water Resources and Electric Engineering
Preliminary Study on Drought Index of Winter Wheat in Cangzhou Area
HA Jian-qiang, LEI De-lin
Journal of Hebei University of Water Resources and Electric Engineering . 2018, (1): 48 -51 .  DOI: 10.16046/j.cnki.issn1008-3782.2018.01.010