Arndt, K. J. R., & Steiger, E. (1964). The Ernst Steiger collections of German-American newspapers and periodicals in Heidelberg and Vienna: Diligently compared and catalogued for co-operating libraries as a guide to microfilm copies of the Heidelberg collection. [Worcester? Mass.]: K.J.R. Arndt.

Arndt, Karl John Richard., and Ernst Steiger. The Ernst Steiger Collections of German-American Newspapers and Periodicals in Heidelberg and Vienna: Diligently Compared and Catalogued for Co-operating Libraries As a Guide to Microfilm Copies of the Heidelberg Collection. [Worcester? Mass.]: K.J.R. Arndt, 1964.

Arndt, Karl John Richard., and Ernst Steiger. The Ernst Steiger Collections of German-American Newspapers and Periodicals in Heidelberg and Vienna: Diligently Compared and Catalogued for Co-operating Libraries As a Guide to Microfilm Copies of the Heidelberg Collection. [Worcester? Mass.]: K.J.R. Arndt, 1964.