The variation characteristic of different levels of precipitation and extreme precipitation in Loess Plateau of Gansu province region in recent 52 years
YANG Dong, CHENG Junqi, LI Xiaoya, WANG Hui, GUO Peipei
Ecology and Environment . 2012, (9): 1539 -1547 .  DOI: 10.16258/j.cnki.1674-5906(2012)09-1539-09

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