Educational screen & audio-visual guide (c1956-1971])

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where you need it! when you need it! There's no need for a special room assignment, [no delay, when the classroom has levolor a.v. j(Audio-"Visual) Venetian blinds. These blinds give complete control of ambient light to suit the subject, projector and student activity. Today, any classroom can be converted for AudioVisual instruction inexpensively by the installation of levolor a.v. blinds. Write for Levolor's invaluable survey report "How Dark Should Classrooms Be For Audio-Visual Instruction?" No charge or obligation. Write to Audio-Visual Dept., Levolor Lorentzen, Inc., 720 Monroe St., Hoboken, N. J. HOlv ""•If Be sure to specify The Scientifically Developed Audio-Visual Blind COPYRlCHTi LEVOLOR LORENTZEN, INC, EdScreen & AV Guide — September, 1959 461