Edgar Rice Burroughs (2015). “THE BARSOOM CHRONICLES - Under the Moons of Mars Series: Complete Collection (Illustrated): A Princess of Mars, The Gods of Mars, The Warlord of Mars, Thuvia, Maid of Mars, The Chessmen of Mars, The Master Mind of Mars, A Fighting Man of Mars, Swords of Mars, Synthetic Men of Mars and more”, p.500, e-artnow