Index to overhead transparencies

Manylion Llyfryddiaeth
Awdur Corfforaethol:	California (Southern) University. National Center for Educational Media
Fformat:	Llyfr
Iaith:	English
Cyhoeddwyd:	New York R.R. Bowler 1969.
Pynciau:	Visual aids > Index. Teaching aids and devices > Index. Transparencies, overhead > Index.