1. A sampling procedure for mailed questionnaires;El-Badry;J. Amer. Statist. Assoc.,1956
2. The problem of non-response in sample surveys;Hansen;J. Amer. Statist. Assoc.,1946
3. Estimation of population mean using auxiliary character in presence of non-response;Khare;Nat. Acad. Sci. Lett., India,1993
4. Study of conventional and alternative two-phase sampling ratio, product and regression estimators in presence of non-response;Khare;Proc. Indian Nat. Sci. Acad.,1995