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

Vols. 7-10, 12-13, 15-17 include section "Bibliography and index to new genera, species and varieties of Foraminifera" (varies) by H. E. Thalmann.