00292nam a2200121Ia 4500020001500000082002600015100001900041245003700060260004800097300001500145500000500160700000500165  a0521210542  a338.163147913bY68.TS  aYoung, Anthony  aTropical soils and soil surveyb  aCambridgebCambridge University Pressc1976  avii, 468p.  a  a