551 I ATION January IS. 1920 TION 555 … Grand Rapids Vapor Kilns LEARN TO FLY are used by these aircraft concerns with absolute in old established school, under an instructor who has satisfaction. AMERICAN ACES ENGINEERS Army Training Planes Used. Submit your drying problem to experts who make a specialty of kiln design and arc prepared…
Aviation Week
Internet Archive · Public domain (published before 1931). Free to use for anything.
