TY  - BOOK
AU  - Nel,Barend Frederik
ED  - South African Association for the Advancement of Education.
TI  - Differentiation: Differensiasie. Papers read at the tenth Congress of the South African Association for the Advancement of Education, held at Durban from 20-22 Jan. 1972
T2  - Publication series of S.A.A.A.E., no. 6
AV  - LB3061 .S6 1972
U1  - 371.2/54 
PY  - 1972///]
CY  - [Durban
KW  - Ability grouping in education
KW  - Congresses
N1  - English or Afrikaans; Includes bibliographical references
ER  -