ISBN 0938650807 books & textbook
How Purdy Won: 1st World Champion of Correspondence Chess (Purdy Series)
Purdy, C. J. S. Hutchings, Frank Harrison, Kevin
Thinkers Pr Inc / Chessco /1998-10T Paperback / 176 Pages
isbn-10: 0938650807 / isbn-13: 9780938650805
