by World Federation of Education Associations. Conference, World Federation of Education Associations

1925

by Industrial Workers of the World. Convention

1906

by Industrial Workers of the World

1906

by World Association for Adult Education

1919

by World Power Conference

1930

by World Association for Adult Education

1924

by World Peace Foundation

1928

by World Association for Adult Education

1930

by World missionary conference. Continuation committee

1913

by World Confederation of Organizations of the Teaching Profession

1962 · Washington : World Confederation of Organizations of the Teaching Profession

by United States. Congress. House. Committee on World War Veterans' Legislation

1944

by World Association for Adult Education

1929