TY  - BOOK
AU  - Langley,Russell
TI  - Practical statistics simply explained / 
T2  - Dover science books
SN  - 0486227294
AV  - QA276.2 L35 1971
PY  - 1971///
CY  - New York : 
PB  - Dover Publications, 
KW  - Lemb
KW  - Estadistica Matematica
KW  - Probabilidad
KW  - Problemas, ejercicios, etc
ER  -