TY - BOOK AU - Macnab,D.S. AU - Cummine,J.A ED - Basil Blackwell Ltd TI - Teachong mathematics 11-16: a difficulty - centred approach SN - 0631141480 U1 - 510.712 23 PY - 1986///. CY - Oxford: PB - Basil Blackwell, KW - Mathematics KW - Study and teaching (Secondary) ER -