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Filters: Author is Pfiffner, H.  [Clear All Filters]
K. Wehrle, Pfiffner, H., Meuli, C., y Muller, H., Building construction, vol. no. 3. St. Gallen, Switzerland: SKAT (Swiss Centre for Development Cooperation in Technology and Management), 2000, p. 57 p. : fig., photogr., techn.drwg.
H. Pfiffner, «Summary of the gravity water supply design and hydraulic correspondence course». Sarvodaya Rural Technical Services, Moratuwa, Sri Lanka, p. 47 p.: fig., 1989.
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