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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.
Announcements for the following year included in some vols.
A summary report prepared in cooperation with the Dirección de Montes, Minas, y Aquas, Ministerio de Agricultura, under the auspices of the Interdepartmental Conference on Scientific and Cultural Cooperation with the American Republics, Department of State.
Announcements for the following year included in some vols.