Encuesta Mexicana de Fecundidad, 1976-77 Conditions of Release Data may be used for academic research, provided that credit is given in any publication resulting from the research to the institute that conducted the survey and that two copies of any publication are sent to the institute: Lic. Humberto Molina El Director General de Estad¡stica Instituto Nacional de Estad¡stica, Geografia e Inform tica Av. Insurgentes Sur 795, Piso 13 Co. Napoles C.P. 03810 Delegaci¢n Benito Juarez Mexico DF 12 Mexico If you have questions or comments about the data, send e-mail to: wfs@dhsprogram.com