Thinking without language: psychological implications of deafness

by: Furth, Hans G., 1920-1999
Published: New York [u.a.] : Free Pr. [u.a.], 1966

Intelligenz und Erkennen: die Grundlagen der genetischen Erkenntnistheorie Piagets

by: Furth, Hans G., 1920-1999
Published: Frankfurt am Main : Suhrkamp, 1972