[1]
J. K. Wanjiru and G. Chumba , Trans., “Modified Regression Type Estimators in the Presence of Non-Response in Two Phase sampling”, int.jour.sci.res.mana, vol. 6, no. 07, p. ijsrm/v6i7.m01, Jul. 2018, doi: 10.18535/ijsrm/v6i7.m01.