ធនធាន ដាក់ស្លាក: Rill Erosion
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05 សីហា 2021 This book describes how to prevent gullies from eroding further after heavy rainfall. It also includes questions for discussion and a drawing and labelling activity. Adapted from material taken fromFootsteps 1995, the literary publication ofTearfundwith kind permission. This edition published in...
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