Utkarsh,

• 2015, Volume 16, Issue Number: 2 - Articles
  Some Improved Estimators for Ratio and Product of two Population Means Using auxiliary character and two phase Sampling scheme in the Presence of Non-Response
  Abstract
• 2017, Volume 18, Issue Number: 2 - Articles
  Two General Classes of Chain Type Estimators for Product of Two Population Means Using Two Auxiliary Characters in The Presence of Nonresponse
  Abstract

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