1981
M. A. Gill,
« Development of water resources in the Sokoto State », in
Water and waste engineering in Africa : proceedings of the 6th WEDC Conference 24-28 March 1980 at Ahmadu Bello University, Zaria, Nigeria, 1981.
M. A. Abdullah,
« Engineering measures for the development of surface water resources in Kano State », in
Water and waste engineering in Africa : proceedings of the 6th WEDC Conference 24-28 March 1980 at Ahmadu Bello University, Zaria, Nigeria, 1981, p. p. 74-79.
J. M. Kalbermatten et Montanari, F. W.,
« The International Drinking Water Supply and Sanitation Decade : papers presented at Plenary Session, ASCE International Convention, New York, NY, May 11-15, 1981 ». ASCE, Environmental Impact Analysis Research Council, New York, NY, USA, 1981.
W. A. Pettyjohn,
« Introduction to artificial ground-water recharge ». US Environmental Protection Agency (EPA), Robert S. Kerr Environmental Research Laboratory, Ada, OK, USA, p. v, 44 p.: 23 fig., 1981.
S. S. Patwardhan,
« Meterisation in developing countries for urban rural towns », in
3rd Asia Pacific Regional Water Supply Conference and Exhibition, Nov. 15-19, 1981, PICC, Manila, Philippines : proceedings, 1981, p. p. 223-227.
I. Directorat ID, Bogor, I. D. Joint Urba, et DGIS, D. General fo,
« Perbaikan kampung - kampung improvement Bogor, Tangerang, Bekasi, Cirebon : case study MCK ». Joint Urban Development Consultants, Bogor, Indonesia, 1981.
J. M. Kalbermatten et Gunnerson, C. G.,
« Project monitoring and reappraisal in the International Drinking Water Supply and Sanitation Decade : papers presented at Session 40, ASCE International Convention, New York, NY, May 11-15, 1981 ». American Society of Civil Engineers, New York, NY, USA, p. vi, 253 p., 1981.
H. Shipman,
« Report on the Peru Water Systems and Environmental Sanitation Project », vol. no. 6. Water and Sanitation for Health Project (WASH), Arlington, VA, USA, p. 8, ((14)) p., 1981.
H. Shipman,
« Strategies for financing water and sanitation projects »,
Bulletin of the Pan American Health Organization, p. p. 208-215, 1981.
WHO -Geneva, CH, World Health Organization,
« Systeme d'information sur les projets et les programmes ». World Health Organization, Global Promotion and Cooperation for Water Supply and, Geneva, Switzerland, p. 27 p.: ill., 1981.