00590nam a22001931 4500 1/2418 931014s1977 nyn 001 0 eng d 2567 DLC GR-PeUP 001.4'222 CO Cochran, William Gemmell, 1909- Sampling techniques / William Gemmell Cochran. 3rd ed. New York : John Wiley & Sons, c1977. xvi, 428 p.; 23 cm. Index. Bibliography. Sampling (Statistics). INST UNIPILB MAIN 20040709 001.4'222 CO 00112016 00112016 LOAN 0 1