[2005] VALDIVIA, Martín. “Peru: is identifying the poor the main problem in reaching them with nutrional programs”. En: GWATKIN, Davidson R.; WAGSTAFF, Adam; YASBECK, Abdo S. Reaching the poor with health, nutrition, and population services: what works, what doesn’ t, and why. Washington, D.C.: World Bank. p. 307-334.

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