Philippine Center for Water and Sanitation - International Training Network Foundation -Manila, PH, PCWS-ITNF,
“The ecological sanitation alternative : first orientation workshop, Butuan City, Agusan del Norte, Philippines, January 31-February 4, 2000”. Philippine Center for Water and Sanitation - The International Training Network (ITN) Foundation, Manila, Philippines, p. 18 p., 2000.
