00506nam a2200181Ia 4500001001000000003000500010008004100015010001100056040000900067082002200076100002000098245008400118260002600202300001100228650003100239650002800270650002600298Para_6931CHAP220125s1961    xx            000 0 und d  a205717  cCHAP  aPA-C 631.0913 W75  aWrigler, Gordon  aTropical agrriculture  :b the development of production  /c by Gordon Wrigley  aLondres  :b Batsford  a291 p.  aAgricultura x trópicos   aCultivos x rendimiento  aSuelos x análisis