Motion pictures and filmstrips, January-June 1971

by Library of Congress. Copyright Office

SOLID GOLD PIE. See

DEATH VALLEY DAYS.

SOLID SAMPLING. See

BASIC INFRARED SPECTROSCOPY.

SOLID WASTE, A NEW POLLUTANT. See

AMERICA'S URBAN CRISIS.

SOLVING IMPASSES IN EDUCATIONAL NEGOTIATIONS. Negotiations Management Service, division of Educational Service Bureau. Made by Astrafilms. 35 min., sd., color, 16 mm. © Educational Service Bureau, Inc.; 7Jan70; MP21189.

SOLVING PAIRS OF EQUATIONS. General Learning Corp. Distributed by Silver Burdett Co., a division of General Learning Corp. Made by Davidson Films. 9 min., sd., color, 16 mm. (Elementary mathematics for teachers and students) Presented in cooperation with National Council of Teachers of Mathematics. Appl. author: General Learning Corp., employer for hire. © General Learning Corp.; 5Aug70; MP21095.

SOME ECOLOGICAL CONSIDERATIONS. See

THE ECOLOGICAL CRISIS.