Watch List notes:

Campbell, Lance K., Prisoner of War and Concentration Camp Money of the 20th Century, Port Clinton, Ohio, USA, 1989, First Edition, 143 pages, hardcover. It covers POW camp money from the Boer War, World War I, World War II, the Vietnam War and other conflicts, and periods in between wars. It covers most countries of the world, and is the most comprensive book available, out of print and difficult to find.

Estimate: 40-60 USD