Issues of communication, participation and development are at the core of other of his books: "Las Radios Mineras de Bolivia" (1989) written in collaboration with Bolivian journalist Lupe Cajías; "Comunicación Alternativa y Cambio Social" (1990); "Conservacion, Desarrollo y Comunicacion" (1990); "NGO Puzzle" (Nigeria, 1993) in collaboration with G.K. Ngeri Nwagha; "Popular Theatre" (Nigeria, 1994); "Making Waves: Participatory communication for social change" (New York, 2001), a research project for The Rockefeller Foundation, published in Spanish, English and French; and "Communication for Social Change Anthology: Historical and Contemporary Readings" (New York, 2006), edited in collaboration with Thomas Tufte, launched at the World Congress of Communication for Development (WCCD) in Rome, October 2006.