TY  - BOOK
AU  - Popham,W.James
AU  - Sirotnik,Kenneth A.
TI  - Educational statistics: use and interpretation 
SN  - 060452528
AV  - LB2846  .O4 1967
U1  - 310.21   22nd ed.
PY  - 1967///
CY  - London
PB  - Harper and Row
KW  - Educational statistics
N1  - Includes bibliographical references and index
ER  -