State Dept - Diplomatic Correspondence With Belligerent Governments Reference Books. Library Editions - Volume 3 and 4.
Volume 3 is 387 pages; Volume 4 is 449 pages. These are rare WWI reference books -- the only ones that I could fine online were in digital format. The cloth bound covered books measure 25 x 20 inches and are quite. They are library editions, the pages inside the book are in excellent condition.