History of endoscopy Vol. V - VII - Reuter, Matthias A.; Reuter, Hans Joachim 1923-2003; Engel, Rainer M.; Edmonson, James M. (Kräamer, 2003)
Enth.: Vol. 5. History of transurethral prostatectomy (TURP). - Vol. 6. History of esophagoscopy and gastroscopy. - Vol. 7. Norbert Hennings Journal (1896 - 1985). - Appendix: The importance of the instrument makers for the endoscopy