00640cam a22002291 4500 ca 30000173 DLC 20260227111122.0 770913s1929 xx 000 0 eng ca 30000173 (OCoLC)3261493 DLC OC DLC TL546 .D3 Dayton school of aviation. Lesson[s] [by] Robert L. Rockwell. Dayton, O., The Dayton school of aviation [c1929] 60 pt. in 1 v. illus. 22 cm. Each part paged separately. Aeronautics. Airplanes. Rockwell, Robert L. 16590 16590