The free family. A creative experiment in self-regulation for children. Illustrated with photographs and drawings.
Ritter, Paul,M.C.D., B.Arch.
Ritter, Jean,B.Sc., Dipl.Ed.
London, 
1959.
[With a bibliography.]
Joint authors: Paul Ritter, M.C.D., B.Arch. and Jean Ritter, B.Sc., Dipl.Ed.