They see what you mean
Subtitle: visual communication with the overhead projector
By: by Ozalid Audio-Visual Department.
Publisher: Ozalid, Division of General Aniline and Film Corporation
Published: 1959
Place of publication: Johnson City, N.Y
Language: eng
Number of pages: 88
Subjects: Overhead projection.; Projectors.; Transparencies.; Communication.
Notes: Bibliography: p.88.