India. Vital Statistics Division. (1970). Sample registration system. Vital Statistics Division, Office of the Registrar General, India, Ministry of Home Affairs.
Chicago-referens (17:e uppl.)India. Vital Statistics Division. Sample Registration System. New Delhi: Vital Statistics Division, Office of the Registrar General, India, Ministry of Home Affairs, 1970.
MLA-referens (8:e uppl.)India. Vital Statistics Division. Sample Registration System. Vital Statistics Division, Office of the Registrar General, India, Ministry of Home Affairs, 1970.
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