Lorus Johnson Milne & Margery J. Milne, A Multitude of Living Things, New York, Dood, Mead & Company, (1945) 1947, pp. 35-43.
Lorus Johnson Milne & Margery J. Milne, A Multitude of Living Things, New York, Dood, Mead & Company, (1945) 1947, pp. 35-43.