Description of a projector designed for use in hallway displays.
Proceedings of the Iowa Academy of Science
© Copyright 1937 by the Iowa Academy of Science, Inc.
Gilbertson, H. C.
"A Semi-Automatic Film Slide Projector,"
Proceedings of the Iowa Academy of Science, 44(1), 151-151.
Available at: https://scholarworks.uni.edu/pias/vol44/iss1/55