Im researching the period for a game I'm writing doing a lot of reading, last two on this area -

(1) The economics of World War I / edited by Stephen Broadberry and Mark Harrison.

(2) American "reparations" to Germany, 1919-33 : implications for the Third-World debt crisis / Stephen
(Princeton, N.J. : International Finance Section, Dept. of Economics,Princeton University, c1988.)