by Roger Bigelow Merriman

1925

by Roger Ward Babson

1915 · London : Duckworth

by Roger William Conant

1920

by Roger D. Upton

1881

by Roger Ward Babson

1910

by Roger William Cooley, Lawrence Vold

1905

by Roger J. Vaughan

1979 · Council of State Policy & Planning Agencies

by Caleb Guyer Kelly, Kent Roberts Greenfield, Kokichi Morimoto, Roger Howell

1918

by Roger W. Babson

1926

by Roger Bailey Corbett

1926

by Roger William Cooley

1912

by Roger Ward Babson

1925