01 សីហា 1977 The presentation provides technical information about wells and pumps; it can be of value to those with a high degree of technical knowledge but limited current experience, as well as to lay persons seeking a basic understanding of wells and pumps. Although it is not intended to be a...
01 កុម្ភៈ 1979 This book is designed to aid both the technical instructor as a training manual and the Peace Corps Volunteer as a field resource reference. It includes sections on wells, pumps, and defines a water well program. 170 pages, illustrated