Details
Lilianthal, Otto: Der Vogelflug als Grumdlage der Fliegekunst,
Berlin 1889, embossed cloth cover, colour frontispiece, text, diagrams and fold-out tables; and a paper-back describing the Dornier Do X
Berlin 1889, embossed cloth cover, colour frontispiece, text, diagrams and fold-out tables; and a paper-back describing the Dornier Do X