Answer: idatarbell

AnswerCrossword Clue
IDATARBELL"The History of the Standard Oil Company" author
IDATARBELLProgressive Era muckraker
IDATARBELLMuckraker
IDATARBELL"The History of the Standard Oil Company" journalist
IDATARBELLNoted early 20th-century writer-reformer
IDATARBELLExposer of Standard Oil during the Progressive era