by Carnegie Endowment for International Peace. Division of Economics and History

1928

by Carnegie Endowment for International Peace

1924

by Carnegie Library of Pittsburgh

1921

by Carnegie Endowment for International Peace

1912

by Carnegie Endowment for International Peace

1913

by Carnegie Endowment for International Peace

1925

by Carnegie Endowment for International Peace

1924

by Carnegie Corporation of New York

1922

by Carnegie Library of Pittsburgh

1922

by Carnegie Endowment for International Peace. Division of Intercourse and Education

1915

by Carnegie Library of Pittsburgh

1922

by Carnegie Library of Pittsburgh

1922