000 00370 a2200145 4500
082 _a630.7
_bRES
090 _c21699
_d33837
245 _aResearch observer
260 _aWashinagton
_bThe World Bank
_c1986
_g1986
300 _a112p.
_c25cm
440 _v1
650 _aEducation, research, related topics
650 _aAgriculture and related technologies
942 _cL
999 _c49150
_d49150