The book (published by Wiley, Chichester, 1979, reprinted 1987, 1994) is now out of print, and the copyright has reverted to the author. Permission is granted for the material to be freely downloaded and distributed for instructional non-profit purposes.
Grateful thanks to Alan Bain, whose initiative made this possible.
Nicky van Foreest has kindly upgraded the book's djvu file to enable searching: free plug-ins available from DjVu home.