TY  - BOOK
AU  - Snedecor,George Waddel
AU  - Cochran,William Gemmell
TI  - Statistical methods
SN  - 0813815606
AV  - HA29 .S63 1978
PY  - 1987///
CY  - Ames, Iowa 
PB  - Iowa State University Press 
KW  - Estadística
N1  - Includes bibliographical references and index
ER  -