India. Registrar General and Census Commissioner. (1958). Census of India 1951: Paper no 6 : 1955 - working population in Calcutta, industrial region - distribution by industry, place of birth and educational attainment - 1951 Census. Registrar General and Census Commissioner, Govt. of India.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিIndia. Registrar General and Census Commissioner. Census of India 1951: Paper No 6 : 1955 - Working Population in Calcutta, Industrial Region - Distribution by Industry, Place of Birth and Educational Attainment - 1951 Census. Registrar General and Census Commissioner, Govt. of India, 1958.
M.L.A (9 ম সংস্করণ) উদ্ধৃতিIndia. Registrar General and Census Commissioner. Census of India 1951: Paper No 6 : 1955 - Working Population in Calcutta, Industrial Region - Distribution by Industry, Place of Birth and Educational Attainment - 1951 Census. Registrar General and Census Commissioner, Govt. of India, 1958.