Urquidi, V. L. (1971). Man’s impact on the global environment : assessment and recommendations for action. Report of the Study of Critical Environment Problems (SCEP). Massachussetts : The MIT Press, 1970. xii-319 p. Foro Internacional, 12(2), 270–271. Recuperado a partir de https://forointernacional.colmex.mx/index.php/fi/article/view/512