<?xml version="1.0"?>
<dblp>
<book key="books/wi/Cochran77" mdate="2002-01-03">
<author>William G. Cochran</author>
<title>Sampling Techniques, 3rd Edition.</title>
<publisher>John Wiley</publisher>
<isbn>0-471-16240-X</isbn>
<year>1977</year>
</book>



</dblp>
