TY  - BOOK
AU  - Downie,N.M.
AU  - Heath,R.W.
TI  - Basic statistical methods
T2  - Education for living series
U1  - 519.5 21
PY  - 1970///]
CY  - New York : 
PB  - Harper & Row
KW  - Statistics
N1  - Bibliography: p. 267-268; المحتويات :
ER  -