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A map and report on the geology of the Horn map-area based on observations on the Paleozoic and Mesozoic strata.
1919/28 cumulation includes material previously issued in the 1919/20-1935/36 issues and also material not published separately for 1927/28. 1929/39 cumulation includes material previously issued in the 1929/30-1935/36 issues and also material for 1937-39 not published separately.
Prepared under the auspies of the Agency for International Development of the U.S. Dept. of State.