Becerra Marzano de Gonzales, A.M.

Haratani, J., Viveros-Long, A.M. & de Gonzales, A.M.Becerra Ma, 1981. Peru : CARE OPG Water Health Services Project, (AID project impact evaluation report no. 24) Washington, DC, USA: USAID. Available at: https://fr.ircwash.org/sites/default/files/827PE.AN81-1048.pdf.