Hubbard, Thomas OBrien, 1882- The aeroplane : an elementary text-book of the principles of dynamic flight / by Thomas OBrien Hubbard, J. H. Ledeboer and C. C. Turner - London : Longmans, Green, 1911 - xi, 127 p. ; 20 cm. Bibliography : p. 116-120 Subjects--Topical Terms: AirplanesAeronautics Dewey Class. No.: 629.13