TY - SER AU - Scherr, S.J. TI - Preliminary guide to audiovisual materials on environmental and natural resouce issues in developing countries: a survey for the U.S. agency for international development/man and the biolsphere program T2 - A.I.D. research & development abstracts ; PY - 1981/// CY - Washington-US : PB - United States Agency for International Development, N1 - Artículo dentro de: Environment & natural resources-forest resources reports; Sumarios de investigación ER -