TY  - BOOK
AU  - Cahen L S
AU  - Romberg T A
AU  - Zwirner Walter
TI  - Estimation of mean achievement scores for schools by the item-sampling technique
U1  - 371.26 
PY  - 1968///
CY  - New Jersey
PB  - ETS
KW  - Educational tests and measurements
ER  -