Quotes from Ida M. Tarbell's books, and about them
The Bully Pulpit on The History of the Standard Oil Company: “Tarbell's Standard Oil series eventually stretched over a three-year period; Steffens's studies of corrupt political machines...generated fourteen articles and two books.”
The Bully Pulpit on The Tariff in Our Times: “Tarbell's six-part series, “The Tariff in Our Times,” ran from December 1906 through June 1907, with three additional installments published two years later.”