Columbia subject headings:
Harvard subject headings:
Locomotives--Periodicals.
Railroads--Periodicals
Princeton subject headings:
Brotherhood of Locomotive Engineers (U.S.)--Periodicals.
Locomotive engineers--Labor unions--United States--Periodicals.
Locomotive engineers--United States--Periodicals.
Locomotives--United States--Periodicals.
Periodicals.
Railroads--United States--Periodicals.