Census of India, 1991 Economic tables. Uttar Pradesh. V. 25 & V. 2, Pt. IIIB-B series, Tables B-6 (f), B-7 (f), B-8 (f) - Uttar Pradesh Govt. Press 1991 - vii, 1093p cm. Source: General Book Dewey Class. No.: Y:5.252sN91, P0.25