Advance in researches on slop length factor in Universal Soil Loss Equation

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[42]	��.�ƾ��.�� GIS��RS֧��µ��ʴģ��Ӧ��о� 2005(4)
[43]	��ΰ ��GIS��USLE��ʴ��Ч��о�:��ʡ��ز��Ϊ�� 2003
[44]	Ф��.֣�� Ϸ��ˮ��ɳ��ʴ��̵�Ӱ�� 2003(3)
[45]	��ɲ�.�� GIS֧��µ��ʴ��:�Խ��ʡ̩��ع�Ϫ��Ϊ�� 1999(1)
[46]	��.��.�� GIS��Ⱦ��о� 2002(2)
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[53]	��ΰ.��.�� GIS��RUSLE�Ļ��ԭС��ʴ�� 2009(8)
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