TY  - BOOK
AU  - Walker,Helen
AU  - Lev,Joseph
TI  - Elementary Statical Methods
U1  - 001.422 
PY  - 1969///
CY  - New York
PB  - Rinehart and Winston
KW  - ESTADISTICA
KW  - MUESTREO
KW  - DISEÃO EXPERIMENTAL
ER  -