1981
P. H. Water Reso City y Manila, P. H. Asia Found,
«Installation manual for cylinder pump». University of San Carlos, Water Resources Center, Cebu, Philippines, p. 23, ((17)) p. of tech. drawings: fig., 1981.
H. Van y Pineo, C. S.,
«Institutional development for IEOS : Instituto Ecuatoriano de Obras Sanitarias : report», vol. no. 12. Water and Sanitation for Health Project (WASH), Arlington, VA, USA, p. iii, 57, 3 p.: fig., tab., 1981.
R. B. Isely,
«Intensive session on water, sanitation and health education : a workshop held at UNICEF Headquarters, 22-23 April 1981», vol. no. 31. Water and Sanitation for Health Project (WASH), Arlington, VA, USA, p. 16, ((11)) p., 1981.
J. M. Kalbermatten y 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.
IRC,
«IRC International Water and Sanitation Centre Annual Report 1980». IRC International Water and Sanitation Centre, The Hague, The Netherlands, p. 63, 1981.
WHO -Geneva, CH, World Health Organization, UNDP -New York, NY, US, y UNICEF -New York, NY, US,
«Journey for survival». Dick Young Productions, New York, NY, USA, p. film (15 min.): 16 mm, 1981.
K. Rajagopal, Lohani, B. N., y Loehr, R. C.,
«Land application of sewage sludge - the status», vol. no. 2/3. Environmental Sanitation Information Center, ENSIC, Bangkok, Thailand, p. vii + 127 p. : 26 fig., 42 tab., 1981.
J. P. Lahaye,
«L'approvisionnement en eau du milieu rural en Africain Occidentale et Centrale». Comite Interafricain d'Etudes Hydrauliques (CIEH), Ouagadougou, Burkina Faso, p. 22 p., 1981.
D. Hilton,
«L'enseignement sanitaire par les histoires». Tearfund, Teddington, UK, p. 50 p.: drawings, 1981.
B. F. C. I. E. H. - Ouagadougou,
«Les questions sanitaires en milieu rural Africain». Comite Interafricain d'Etudes Hydrauliques (CIEH), Ouagadougou, Burkina Faso, p. 56 p.: tab., 1981.
S. O. Adeyeni,
«Local materials as filter material in Nigeria», in
Water and waste engineering in Africa : proceedings of the 6th WEDC Conference 24-28 March 1980 at Ahmadu Bello University, Zaria, Nigeria, 1981, pp. P. 153-156.