The Suspension of United States Mail to Switzerland 1942-1944/45, by C J LaBlonde.

Published by American Helvetia Philatelic Society, 2006.  Sp/B, 90pp.

A look at postal history during the period of suspended US mail to Switzerland.  Includes evidence of other mail affected by the suspension, such as Canadian, New Zealand, South American, and Red Cross, and also briefly covers Swiss suspension of mail.  Illustrated in black & white.