TY  - BOOK
AU  - Popham,W.James
AU  - Sirotnik,Kenneth A.
TI  - Educational statistics; use and interpretation
T2  - Exploration series in education
SN  - 0060452528
U1  - 370/.1/82 
PY  - 1973///]
CY  - New York
PB  - Harper & Row
KW  - Educational statistics
ER  -