D. D. Mara,
Bacteriology for sanitary engineers. Edinburgh, UK: Churchill Livingstone, 1974, p. x, 209 p. : fig.
S. Lundin,
« The consumption of household water in Sagure : an appraisal of five years work on water sanitation », vol. no. 98. CADU - Chilalo Agricultural Development Unit, Assella, Ethiopia, p. 32 pp. : 21 tab., 4 app., 1974.
N. F. Carefoot,
« Development of a national training delivery system for water and waste water personnel in Spanish-speaking Latin America ». University of Pittsburgh, Graduate School of Public and International Affairs, Pittsburgh, PA, USA, p. Microfiche (viii, 110 p.), 1974.
M. Noll,
« Die Besiedlung von Langsamsandfiltern und ihre Beeinflussung durch Pestizide », vol. no. 19. Institut fur Wasserforschung -Dortmund, DE, Dortmund, Germany, p. 179 p. : 36 fig., 12 tab., 1974.
F. Sargent,
Human ecology. Amsterdam, The Netherlands: North-Holland Publishing Company, 1974, p. xii, 475 p. : fig., tab.