The impact of climatic variations on agriculture ; Vol. 2. Assessments in semi-arid regions / Editori M.L. Parry ; T.R. Carter, N.T. Konijn . Dordrecht :  Kluwer Academic Publ. , 1988 . 764 s . ISBN 90-277-2719-8 . [1, z toho požičaných 0]