Ecological effects of in-situ sediment contaminants : proceedings of an international workshop, held in Aberystwyth, Wales, 1984 / edited by R. Thomas, R. Evans, A. Hamilton, M. Munawar, T. Reynoldson, and H. Sadar.
Planning now for irrigation and drainage in the 21st century : proc of a conference : Lincoln, Nebraska, July 18-21, 1988 / sponsored by the Irrig and Drain Div of the American Soc of Civil Engineers ; edited by D.R. Hay.
Agriculture, change and human values : proceedings, multidisciplinary conference [Oct 18-21, 1982] / edited by R. Haynes, R. Lanier ; sponsored by University of Florida, Humanities and Agriculture Program ... [et al.].
Agriculture and the management of natural resources : proceedings of the eighth symposium of the European Association of Agricultural Economics [i.e., Economists] EAAE, April 17-18, 1984, Milan, Italy / edited by F. Lechi.