1er avril 2022, par P. Ramirez
1872 Census is part of the Census of Bengal https://babel.hathitrust.org/cgi/pt?id=nyp.33433108155239&view=1up&seq=7&skin=2021
Almost all volumes of the Censuses of Assam from 1881 to 1961 are found on archive.org Google books refers to many of these volumes as well.
The very rich 1891 Provincial tables volume may be accessed through the South Asia Open Archives, e.g. on JSTOR (...)