Svein K. Bertheussen:
Mill engine by Burnley Ironworks Company, 1903
Svein K. Bertheussen:
An amazing collection of important aircraft
Svein K. Bertheussen:
The true pioneers
Svein K. Bertheussen:
Bersey electrical taxi 1897
Svein K. Bertheussen:
Cody Biplane, 1912
Svein K. Bertheussen:
Cody Biplane, 1912