Exercises in mathematics 1-5, by K. B. Swaine and H. F. Cleaves. Pp 159, 175, 190, 172, 170. Books 1 and 2, £1·25 each; Books 3-5, £1·45 each. 1973/4. SBN 0 245 51959 9/51960 2/51961 0/51962 9/51963 7 (Harrap)
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