Singh, H. P., & Tripathi, R. P. (1993). soil erosion and conservation.
シカゴスタイル引用形Singh, H P., , R P. Tripathi. Soil Erosion and Conservation. New Delhi, Wiley Eastern Ltd, 1993.
MLA引用形式Singh, H P., , R P. Tripathi. Soil Erosion and Conservation. 1993.
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