00557     2200205   4500001002100000005001500021035002000036008004100056245005900097100002100156260003600177300003900213084001400252082000800266650002000274650001200294520001700306990001600323990001200339INLIS00000000000431920220414104535  a0010-1021000023220414                g          0 eng  1 aThe biology of agricultural systems /cC.R.W. Spedding  aSpedding, C.R.W.  aLondon :bAcademic Press,c1975  aix, 261 p.: ill.; 23 cm. ;c23 cm.  a631 SPE b  a631 4aFARMING SYSTEMS 4aBIOLOGY  aIncl.  Index  a593/KA/2021  a2112/83