HeimgartnerN. L.A comparative study of change in self-concept: Open space concept versus self-contained classroom. Cited in Research Relating to Children, ERIC Clearinghouse on Early Childhood Education. Bulletin 27. June, 1970-February, 1971, 27-EB-1, P. 39.
2.
KohlH. R.The open classroom: A practical guide to a new way of teaching. New York: Random House, 1969.
3.
SilbermanC. E.Crisis in the classroom. New York: Random House, 1970.
