Fletcher, J. E. 1., Fletcher, E. 1., & Trompf, G. W. 1. (2011). A study of the life and works of Athanasius Kircher, "Germanus Incredibilis": With a selection of his unpublished correspondence and an annotated translation of his utobiography. Leiden [etc.]: Brill.

Fletcher, John Edward 1940-1992, Elizabeth 1942- Fletcher, and Garry Winston 1940- Trompf. A Study of the Life and Works of Athanasius Kircher, "Germanus Incredibilis": With a Selection of His Unpublished Correspondence and an Annotated Translation of His Utobiography. Leiden [etc.]: Brill, 2011.

Fletcher, John Edward 1940-1992, Elizabeth 1942- Fletcher, and Garry Winston 1940- Trompf. A Study of the Life and Works of Athanasius Kircher, "Germanus Incredibilis": With a Selection of His Unpublished Correspondence and an Annotated Translation of His Utobiography. Leiden [etc.]: Brill, 2011.