Robert Green Ingersoll (1920). “Ingersoll: Fifty Great Selections, Lectures, Tributes, After Dinner Speeches and Essays, Carefully Selected from the Twelve Volume Dresden Edition of Colonel Ingersoll's Complete Works”
"50 Successful Marijuana Users Who Prove The Person Matters More Than The Plant" By Ryan J. Reilly, Robin Wilkey, www.huffingtonpost.com. April 18, 2014.