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This book examines the needs for and availability of statistics concerning immigrants and immigration. It concentrates on the needs for statistics on immigrants, refugees, and illegal aliens for policy and program purposes, on the adequacy of the statistics that are produced and of the statistical systems that generate them, and on recommendations for improving these systems. Also, the history of immigration legislation and the estimates of the size of the illegal alien population are briefly reviewed.
Nam et al. (Mon,) studied this question.