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s11269-005-9013-z.pdf (出版社版), 523KB
Bordi, I., Fraedrich, K. F., Petitta, M., & Sutera, A. (2006). Large-scale assessment of drought variability based on NCEP/NCAR and ERA-40 re-analyses. Water Resources Management, 20(6), 899-915. doi:10.1007/s11269-005-9013-z.