OBNB doesn't sell books, but you may be able to find a copy at one of these websites:
The cross on the sword : supplement to 'Orders of Knighthood, awards and the Holy See' [third edition] by Peter Bander van Duren. ISBN 0905715322. Published by Van Duren in 1987. Publication and catalogue information, links to buy online and reader comments.
![The cross on the sword : supplement to 'Orders of Knighthood, awards and the Holy See' [third edition]](http://covers.openlibrary.org/b/id/701543-M.jpg)