312.0954(61)
I39C
           Sengupta, P
               Census of India, 1961 economic regionalization of India: problems and approches \ P Sengupta - Delhi : The Author, 1962.
               V.1(xxxviii,257p.) - Monograph series/ed by A Mitra;no.8 .                 Subjects: Census-India; Population-Statistics.