00331nam a2200109Ia 4500008004100000020001400041040002900055050002800084100003600112245005300148260002000201230104s9999||||xx |||||||||||||| ||und||  a891188290  cChuka University Library  aFAO S 599.5bAIP65 1999  aScoones, Ian and Camila Toulmin 0aPolicies for soil fertility management in Africa  aIIEDbIDSc1999