00799nam0-22002771i-450-9900031072004033210-853334-823-5000310720FED01000310720(Aleph)000310720FED0100031072020000920d1979----km-y0itay50------baengIT<<An >>Introduction to Agricultural SystemsC.R.W.SpeddingLondonApplied Science Publishers1979IX, 169 p.21 cmSistemi agricoliSpedding,Colin Raymond William<1925-2012>ITUNINARICAUNIMARCBK990003107200403321H/1110 SPE5764SESSESIntroduction to Agricultural Systems462430UNINA