APA
India G. o. . C. S. O., India G. o. . C. S. O., . (1970). National industrial classification. : .
Chicago
India Government of Central Statistical Organisation, India Government of Central Statistical Organisation, . 1970. National industrial classification. : .
Harvard
India G. o. . C. S. O., India G. o. . C. S. O., . (1970). National industrial classification. : .
MLA
India Government of Central Statistical Organisation, India Government of Central Statistical Organisation, . National industrial classification. : . 1970.
