00516nam a2200133Ia 4500020001500000082002000015100006300035245011600098260003800214300001900252490007200271500000500343700003400348  a0896291162  a338.14bIn61.MA  aInternational Food Policy Research Instt. Washington, D.C.  aA meta-analysis of rates of return to agricultural R & D; expede Herculem ?bcBy Julian M. Alston ... [et..al]  aWashington, D.C.bThe Auth.c2000  ax, 148p. Bibl.  aInternational Food Policy Research Instt., research reportv no.113  a  aAlston, Julian M. and others.