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    A direct formula for normal depth in trapezoidal open channel
                                      
                                            Zhao Yanfeng, Northernwest Agriculture and Forestry University, Yangling (China), College of Hydraulic and Construction Engineering,                              Zhu Hanying, Xi’an Water Affairs Bureau, Xi’an (China), Management Center of Weihe River and Chanhe River,                              Wang Zhengzhong, Northernwest Agriculture and Forestry University, Yangling (China), College of Hydraulic and Construction Engineering                              
Published in Xi bei nong lin ke ji da xue xue bao.Zi ran ke xue ban (01.04.2009)
                   
      
      
                                                                                
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              Published in Xi bei nong lin ke ji da xue xue bao.Zi ran ke xue ban (01.04.2009)
              Journal Article