Ikughur, A. J., M. T. Imande, and S. Vambe. “Investigating the Performance of Horvitz-Thompson and Generalized Regression Estimators in Small Domains With Application to Income and Expenditure of Households in Makurdi-Nigeria”. NIGERIAN ANNALS OF PURE AND APPLIED SCIENCES, vol. 2, Dec. 2019, pp. 214-22, doi:10.46912/napas.124.