Forty Years in Retrospect

Abstract

Samphng The work of Earl Houseman and Charles Sarle pIOneered Improved accuracy and credibility of estimates by what has become the NatIOnal Agncul­ tural StatistICS Service These men were mstrumental In transforming the statistical work of the Department of Agnculture from undisciplined fact-gathering to a probability sampling In a recent Issue, Barry Ford, Jack Nealon, and RDbert Thrtora addressed a long­ neglected subject nonsamplIng errors