Basic technical mathematics, by S. R. Porter and J. F. Ernst. Pp 772. £31·95. 1985. ISBN 0-201-05586-4 (Addison-Wesley) - Basic technical mathematics with calculus, by S. R. Porter and J. F. Ernst. Pp 1115. £31·95. 1985. ISBN 0-201-05589-9 (Addison-Wesley)