1.
Manual on the Automatic Hydraulic Ram for Pumping Water
by Watt, Simon B.
ISBN: 9780903031158
List Price: $14.95
2.
Ferrocement Water Tanks and Their Construction
by Watt, Simon B.
ISBN: 9780903031516
List Price: $22.50
3.
Hand Dug Wells and Their Construction
by Watt, Simon B., Wood, W. E.
ISBN: 9780903031271
List Price: $26.95