Wittich, W. A.
Audio- visual materials : their nature and use / W. A. Wittich, C. F. Schuller - New York : Harper, 1957. - 2 v. ; 21 cm.
Leadership.
025.177 / WIA
Audio- visual materials : their nature and use / W. A. Wittich, C. F. Schuller - New York : Harper, 1957. - 2 v. ; 21 cm.
Leadership.
025.177 / WIA