Biography: John D. Rockefeller, Senior, American Experience, Official Site

By the age of 12, John had saved over $50 from working for neighbors and raising some turkeys for his mother

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John D. Rockefeller - Quotes, Facts & Robber Baron

Management principles from first US billionaire John D. Rockefeller

Titan: The Life of John D. Rockefeller, Sr.: Chernow, Ron

Biography: John D. Rockefeller, Senior

John D. Rockefeller - Wikipedia

Nelson Rockefeller, Biography, Vice President, & Facts

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Without Distinction of Race, Sex, or Creed: The General Education