The Present situation and trends of research in the field of special education, four studies Sweden and other Scandinavian countries, Union of Soviet Socialist Republics, United States of America, Uruguay.

Sonraí bibleagrafaíochta
Údar corparáideach: United Nations Educational Scientific and Cultural Organization
Formáid: LEABHAR
Teanga:English
Foilsithe / Cruthaithe: Paris Unesco 1973.
Ábhair: