TY  - BOOK
AU  - Burns Snodgrass
ED  - Adrian Vance Productions. [from old catalog]
TI  - The Slide rule: combined operations and proportion (Filmstrip)
PY  - 1962///
PB  - Adrian Vance Productions
KW  - Slide-rule
KW  - Ratio and proportion
N1  - Eastman color; With teacher's guide
N2  - Captioned photographs demonstrate a method of calculation which shows the importance of planning in solving problems. Illustrates how to work proportions on the slide rule and includes problems with answers
ER  -