Vol.1. (1978 printing); vol.2. c1976 (1979 printing)
Vols.1 and 3 of course M23M form vols. 1 and 2 of course M23P.
M23M mathematics 'A' Level : a course leading to the University of London G.C.E. 'A' Level examination in mathematics (syllabus D _ subject 391) by Graham Smithers. ISBN 0902404822. Published by National Extension College in 1977. Publication and catalogue information, links to buy online and reader comments.