The overhead projector /
Vincent, Alan.
The overhead projector / by Alan Vincent. - Englewood Cliffs, N. J. : Prentice-Hall, 1965. - 68 p. : ill. ; 22 cm. - Experimental development unit report ; 8 .
Overhead projection.
The overhead projector / by Alan Vincent. - Englewood Cliffs, N. J. : Prentice-Hall, 1965. - 68 p. : ill. ; 22 cm. - Experimental development unit report ; 8 .
Overhead projection.
