TY  - BOOK
AU  - Downie,Norville Morgan
AU  - Heath,R.W.
TI  - Basic statistical methods
SN  - 0060427310
U1  - 519.5 
PY  - 1974///
CY  - New York
PB  - Harper & Row, 
KW  - ESTADISTICA
UR  - https://www.cicy.mx/sitios/sib/doctoelectronico/224.pdf
ER  -