00544pamaa2200169 4500 0000017119 20071107090000.0 0003223965 510 PUR QA37.2 PUR 1995 PURE mathematics 3 & 4 for A and AS level National Extension College Trust ; edited by Graham Smithers. London: Collins Educational, 1995. vi, 370p.: 24cm. Advanced modular mathematics series Mathematics Smithers, Graham National Extension College Trust