As the books, magazines and newspapers in the Prange Collection were processed, ephemera (Prange Call Number AC-0901~1045) were discovered -- 147 items -- including leaflets, fliers, and meeting minutes. Some of the materials were typeset, others were hand-written. The Ephemera were digitized and are available onsite at Prange Collection.
To search the ephemera, go to the National Diet Library of Japan (NDL)'s Digital Collection page. You can limit your search to the Prange Collection ephemera by putting "AC-" in the search box.