Prosistas y poetas: compilación gradual de páginas en prosa y verso / seleccionadas por Ricardo Ryan

The Panama Canal controversy : U.S. diplomacy and defense interests / Paul B. Ryan

Filosofia da educaçao / John D. Redden, FRancis A. Ryan ; traduçao de Nair Fortes Abu-Merhy

Area handbook for Nicaragua / Co-authors: John Morris Ryan [and others] Prepared for the American University by Johnson Research Associates