20.09.1926 31, 25, 332
11.10.1926 31, 28, 371
20.12.1926 31, 38, 498
20.12.1926 31, 38, 500
20.12.1926 31, 38, 502
20.12.1926 31, 38, 510
20.12.1926 31, 38, 511
Erfinder / Entdecker / Pionier
