Authors:

Even theories must have foundations.

Edgar Rice Burroughs (2015). “THE VENUS SERIES - The Amtor of Venus Collection: Complete Edition (Pirates of Venus, Lost on Venus, Carson of Venus & Escape on Venus): From the Author of Tarzan of the Apes, Princess of Mars, Llana of Gathol, Jungle Tales of Tarzan, The Mucker, Pellucidar, The Moon Maid, Tarzan at the Earth's Core and many more”, p.36, e-artnow
Even theories must have foundations.