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@article{MET_1967__12_175338, author = {S.G.P. Ajgaonkar}, title = {A {Note} on {Horvitz's} and {Thompson's} {T3} {Class} of {Linear} {Estimators}}, journal = {Metrika}, pages = {16--21}, publisher = {mathdoc}, volume = {12}, year = {1967}, zbl = {0173.20503}, url = {http://geodesic.mathdoc.fr/item/MET_1967__12_175338/} }
S.G.P. Ajgaonkar. A Note on Horvitz's and Thompson's T3 Class of Linear Estimators. Metrika, Tome 12 (1967), pp. 16-21. http://geodesic.mathdoc.fr/item/MET_1967__12_175338/