Partial Contents: Prepartory meeting on the long-term programme of reseach in scientific hydrology, Unesco House, Paris, 20-29 May, 1963 --Memorandum, U.S. participation in the International Hydrological Decade --Transmittal note, December 10, 1963 --Revised terms of reference, Council for the International Hydrological Decade --Meeting on U.S. Participation in the International Hydrological Decade, held December 18, 1963 at Dept. of State --Program development.