01149cam a2200313 4500 1738185 OS 20151023231638.0 740830s1972 sa a b 100 0 eng 74175409 SA*** DLC DLC DLC engafr LB3061 .S6 1972 371.2/54 South African Association for the Advancement of Education. 40006 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; editor: B. F. Nel. [Durban, 1972] iii, 195 p. illus. 21 cm. Publication series of S.A.A.A.E., no. 6 Includes bibliographical references. English or Afrikaans. Ability grouping in education Congresses. 40009 Nel, Barend Frederik, 1905- ed. 40008 Differensiasie. Publication series of S.A.A.A.E. ; 6. 40007 ddc BK 0 7 cbc orignew 4 ncip 19 y-gencatlg 18144 18144 0 0 ddc 0 1 DAPA DAPA 2013-07-30 6: Differensiasie 371.20 SAV APA058996 2013-07-30 1 2013-07-30 SE 0 0 ddc 0 1 DAPA DAPA 2013-08-14 6: Differensiasie 371.20 SAV APA059396 2013-08-14 3 2013-08-14 SE