I. D. Yayasan Di Yogyakarta,
“Biogas”. Yayasan Dian Desa, Jogjakarta, Indonesia, p. 14 p., 1980.
J. Pickford,
“The design of septic tanks and aqua-privies”, vol. no. 187. Building Research Establishment, Overseas Division, Watford, UK, p. 12 p., 1980.
P. C. Sharma and Gopalaratnam, V. S.,
“Ferrocement biogas holder”, vol. no. 18. International Ferrocement Information Center, Bangkok, Thailand, p. 42 p.: photogr., tab., tech. drwngs, 1980.
P. C. Sharma and Gopalaratnam, V. S.,
“Ferrocement water tank”, vol. no. 2. International Ferrocement Information Center, Bangkok, Thailand, p. iii, 32 p., 1980.
VITA -Arlington, VA, US,
“Overshot waterwheel : a design and construction manual”. Volunteers in Technical Assistance, Arlington, VA, USA, p. iv, 94 p.: fig., 1980.
A. Pacey,
Rural sanitation : planning and appraisal. London, UK: IT Publications, 1980, p. 68 p.: fig., tab.