Methodology
It is a review-based paper prepared by studying the existing relevant
research papers on the international migrations of India and other
various countries; internal migration of India since the first Census of
India 1872; and others articles and research papers on the importance of
Census which are essential materials for the study. These papers are
collected from different national and international journals in the
Google Scholar. The study primarily focussed on the Indian context
though many international papers are being studied on migration and
Census of other countries.