TY  - BOOK
AU  - Cornell,Ethel Letitia
TI  - The effect of trait differences in ability grouping,
T2  - University of the state of New York bulletin ..
AV  - LB3061 .C647
PY  - 1931///
CY  - Albany
PB  - The University of the State of New York Press
KW  - Ability
KW  - Educational tests and measurements
KW  - Grading and marking (Students)
KW  - Testing
N1  - "References": p. 26
ER  -