00551nam a2200205Ia 4500 170901s1979 xx 000 0 und d 0387094148 630.915 H15A Hall, A. E. Agriculture in Semi-Arid Environments Berlin Springer-Verlag 1979 340 Agriculture and related technologies Technology (Applied sciences) Agriculture Arid zone Cannell, G. H. Lawton, H. W. ddc BK 12721 12721 0 0 ddc 0 0 RAU RAU 2017-10-18 0 630.915 H15A 22659 2017-10-18 2017-10-18 BK