Сикорский И. И.
Sikorsky I.
General data Producer info Pictures Video clips Data sources  | Info found on the internetInfo found in book The helicopter or anything a horse can do Colonel H. Franklin Gregory 1948 / London (United Kingdom) George Allen & Unwin LTD Pages: 26, 27  History of the helicopter as told by its pioneers 1907-1956 Jean Boulet 1984 / Paris (France) Éditions France-Empire Pages: 29 Info read from picture |
