John C. Diffor
Educator's Guide to Free Films, Filmstrips, and Slides- Educators Guide to Free Films (Educators Guide to Free Films, Filmstrips & Slides)
- Educators Guide to Free Films, 1993 (For Use During School Year 1993 - 1994)
- Educators Guide to Free Filmstrips
- Educators Guide to Free Filmstrips & Slides
- Educators Guide to Free Filmstrips and Slides (For Use During School Year 1994-1995)
- Educators Guide to Free Filmstrips and Slides, 1993 (For Use During School Year 1993-1994)