William Purdy (Purdy, William)

• 
  The Search for Unity: Relations between the Anglican and Roman Catholic Churches from the 1950s to the 1970s
  by Henry Chadwick, William A. Purdy
  Hardcover, G. Chapman, ISBN 022566710X (0-225-66710-X)
• 
  Space Vehicle Mechanisms: Elements of Successful Design
  by William Purdy, Peter Conley, Douglas Packard
  Hardcover, John Wiley & Sons Inc, ISBN 047112141X (0-471-12141-X)