TY  - BOOK
AU  - Kelly,A.V.
TI  - Teaching mixed ability classes: an individualized approach 
SN  - 0063180243
PY  - 1974///
CY  - London
PB  - Harper & Row
KW  - Ability grouping in education
KW  - Individualized instruction
KW  - Teaching
N1  - Second ed. published in 1978 under title: Mixed-ability grouping; Includes bibliographical references and index
ER  -