WP-LA:Ro

Ro es una lengua artificial a priori diseñada por Edward Powell Foster a partir de 1904.

Bibliografíaa

 * Foster, Edward Powell. Ro.  Cincinnati: 1908 (8 p.)
 * Foster, Edward P. Ro, an international language based on the classification of ideas.  Cincinnati: The Ro Company, 1910 (39 p.)
 * Foster, Edward P. Ru ro, outline of the universal language. Marietta, Ohio: World-Speech Press, 1913 (96 p.)
 * Foster, Edward P. Dictionary of Ro the world language. Marietta, Ohio: World-Speech Press, 1919 (72 p.)
 * Foster, Edward P. Roap, English key to Ro Waverly, West Virginia: Ro Language Society, 1921 (32 p.)
 * Foster, Edward P. Alphabet of ideas, or dictionary of Ro the world language. Waverly, West Virginia: Roia, 1928 (160 p.) PM 8751.F5
 * Foster, Edward P. Ro-Latin-English vocabularium dictionary. Waverly, West Virginia: Roia, 1931 PM 8751.F31
 * Foster, Edward P. English-Ro dictionary. Waverly: Ro Language Society, 1932 (64 p.)