Verlag: National Society for the Study of Education, Chicago, 1961
Anbieter: Rosario Beach Rare Books, Lake Stevens, WA, USA
Hardcover. Zustand: Very Good. No Jacket. VG+ condition, no dust jacket as published.
Verlag: Bureau of Publications, Teachers College, Columbia University, 1956
Anbieter: GridFreed, San Diego, CA, USA
Hardcover. Zustand: Good. Good condition with light wear to cover. Library marking to title page. Missing Dust Jacket. Ex-library.