Audio-visual materials; their nature and use /

Eitemau Tebyg

• Audio-visual materials : their nature and use /
  gan: Wittich, Walter A. (Walter Arno), 1910-
  Cyhoeddwyd: (1957)
• Audiovisual materials : their nature and use /
  gan: Wittich, Walter A. (Walter Arno), 1910-
  Cyhoeddwyd: (1962)
• Using audio-visual materials in education
  gan: Kinder, James S. (James Screngo), 1895-
  Cyhoeddwyd: (1965)
• Instructional technology, its nature and use /
  gan: Wittich, Walter A. (Walter Arno), 1910-
  Cyhoeddwyd: (1979)
• Audio-visual materials and techniques /
  gan: Kinder, James Screngo
  Cyhoeddwyd: (1959)