The Douglas theory, a reply to Mr. J.A. HobsonClifford Hugh Douglas · First published 1921Open the Tome
The Control and Distribution of ProductionClifford Hugh Douglas · First published 1922 · Latest edition 2018Open the Tome
TheosophyRudolf Steiner, Elizabeth Douglas Shields, Henry B. Monges, Thomas O'Keefe, David Ecklund, Clifford Venho · First published 1973Open the Tome
Food habits of seven species of American shoal-water ducksDouglas Clifford Mabbott · First published 1920Open the Tome
