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Announcements for the following year included in some vols.
Announcements for the following year included in some vols.
First multi-year cumulation covers six years: 1965-70.
Includes Part 1A: Books and Part 1B: Pamphlets, Serials and Contributions to Periodicals
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.
1785/1918 includes material issued previously in the annual Bibliography of North America geology, and in cumulative volumes issued by N. H. Darton and F. B. Weeks. 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.