"rowatt, robert w. "
o.h.p.: a guide to the use of the overhead projector/ robert.w. rowatt - 1 ed. - uk : scottish council e.tech 1980. - ", 19p.; 21 cm."
0 86011 028 1
LB1043.5 / .R69 1980
o.h.p.: a guide to the use of the overhead projector/ robert.w. rowatt - 1 ed. - uk : scottish council e.tech 1980. - ", 19p.; 21 cm."
0 86011 028 1
LB1043.5 / .R69 1980