Sampling techniques text New York John Wiley Sons 1977 3rd ed. Ind COCHRAN, William G. STATISTICAL METHODS 519.2 519.2COCs ISBN 0-471-16240-X INLIS000000000006888 Converted from MARCXML to MODS version 3.5 using MARC21slim2MODS3-5.xsl (Revision 1.106 2014/12/19)