Friedo Ricken

Dicionario de Teoria do Conhecimento e Metafisica  Friedo Ricken Encadernado. Unisino, 2003 ISBN 9788574311630     Philosophy of the Ancients  Friedo Ricken Eric Watkins Hardcover. Univ of Notre Dame Pr, 1991-04-21 ISBN 9780268015879     Philosophy of the Ancients  Friedo Ricken Eric Watkins Paperback. University of Notre Dame Press, 1991-12-20 ISBN 9780268015886