TY  - BOOK
AU  - Pidgeon,Douglas A.
AU  - Yates,Alfred
TI  - An introduction to educational measurement
SN  - 710062478a
PY  - 1969///
CY  - London
PB  - Routledge & K. Paul
KW  - Educational tests and measurements
N1  - Bibliography : p. 115-117
ER  -