C. Graham,
« Public education : a training manual ». Caribbean Basin Water Management Project, Bridgetown, Barbados, p. 61 p. : ill., 1979.
PAHO -Washington, DC, US,
« Seminario Interamericano : adiestramiento de personal para el suministro de agua a pequenas comunidades, 20 al 24 de agosto de 1979, Merida, Venezuale ». Pan American Health Organization (PAHO), Washington, DC, USA, p. ca 150 p., 1979.
C. Cox,
« Water main laying; a job aid ». Pan American Health Organization (PAHO), Washington, DC, USA, p. 42 p. : fig., 1979.