1. A guide to the overhead projector
Author: Powell, Len
Library: Central Library and Documentation Center (Kerman)
Subject: Study and teaching - Audio-visual aids ، Mathematics,، Overhead projection
Classification :
QA
19
.
P6
1969
2. Lecturing
Author: Len Powell ; cartoon illustrations by Larry
Library: Library of Faculty Foreign Languages and Literature of University of Tehran (Tehran)
Subject: Lectures and lecturing
Classification :
PN
4193
.
L4
P6
1973
