Books by Langworthy, John Luther

The Aeroplane Boys Flight; Or, A Hydroplane Roundup

The Bird Boys' Aeroplane Wonder; Or, Young Aviators on a Cattle Ranch

The Bird boys : Or, the young sky pilots' first air voyage

The Aeroplane Boys on the Wing; Or, Aeroplane Chums in the Tropics

The Airplane Boys among the Clouds; Or, Young Aviators in a Wreck