Columbia subject headings:
Businesspeople--United States--Biography.
Free enterprise.
Petroleum industry and trade--United States.
Pew, J. Howard (John Howard), 1882-1971.
Harvard subject headings:
Businessmen--United States--Biography
Free enterprise.
Petroleum industry and trade--United States
Pew, J. Howard (John Howard), 1882-1971.
Princeton subject headings:
Pew, J. Howard (John Howard), 1882-1971.