1930 ca. A BOOK OF AIRPLANES ARMY OBSERVATION PLANE by The Two Taylors 12.5″×9″ page 15
1930 ca. A BOOK OF AIRPLANES BOEING MODEL 100 by The Two Taylors 12.5″×9″ page 11
1930 ca. A BOOK OF AIRPLANES BOEING MODEL 204 FLYING BOAT by The Two Taylors 12.5″×9″ page 16