細節
Hoernes, (Hermann); Buch des Fluges
Vols 1-3, Wien, 1911 (Vol 3 1912), original gilt pictorial cloth boards, numerous colour plates, diagrams, photographs, sepia and black and white, some colour, German text, details of flight to date, aircraft ballooning Zeppelin and technical information
Vols 1-3, Wien, 1911 (Vol 3 1912), original gilt pictorial cloth boards, numerous colour plates, diagrams, photographs, sepia and black and white, some colour, German text, details of flight to date, aircraft ballooning Zeppelin and technical information