940.31 Lel I Leiand, Waldo Gifford, 1879- comp. Introduction to the American official sources for the economic and social history of the World war. Comp, by Waldo G. Leland and Newton D. Mereness. New Haven, Yale University Press, 1926 xlvii, p. 532 p. 25 cm. (Economic and social history of the World War. American series)