Book review: The impact of climatic variations on agriculture, volume 1: Assessments in cool, temperate and cold regions: by M.L. Parry, T.R. Carter and N.T. Konijn (Editors). Kluwer Academic Publishers, Dordrecht, The Netherlands, 1988, xii+876 pp., DFl. 220.00, ISBN: 90-277-2701-5