http://pec.lib.wvu.edu/record/P164841951Agreement between the Baltimore and Ohio Railroad Company, the Baltimore and Ohio Chicago Terminal Railroad Company, the Staten Island Rapid Transit Railway Company and employees represented by Non-Operating Organizations signatory thereto.Pamphlet. "Effective September 1, 1951." "Union Shop. Issued by Office Vice President-Personnel." Baltimore and Ohio Railroad Company--Employees--Rules and practice.Railroads--Employees--Labor unions--United States.Staten Island Rapid Transit Railway Company--Employees--Rules and practice.Baltimore and Ohio Chicago Terminal Railroad Company--Employees--Rules and practice.Railroads--Employees--Rules and practice--United States.14256