The Flying Machine Boys on Duty; Or, The Clue Above the Clouds

Hume, Fergus, 1859-1932

Grove, Harriet Pyne

Lassen, Helene [Translator]; Harper, Harry, 1880-1960; Grahame-White, Claude, 1879-1959

Wirt, Mildred A. (Mildred Augustine), 1905-2002

Hornibrook, Isabel, 1859-1952

Snell, Roy J. (Roy Judson), 1878-1959

Le Queux, William, 1864-1927

Wirt, Mildred A. (Mildred Augustine), 1905-2002

Blank, Clair, 1915-1965

Beach, Charles Amory

Warren, George A.