Motion pictures, January-June 1973

by Library of Congress. Copyright Office

Understanding measurement. Troll Associates. Made by the Lunaflick Company, Ltd. 4 min., si., color, Super 8 mm., in cartridge. © Troll Associates; 18Apr73; MP24489.

MP24490.

Understanding time. Troll Associates. Made by the Lunaflick Company, Ltd. 4 min., si., color, Super 8 mm., in cartridge. © Troll Associates; 18Apr73; MP24490.

MP24491.

Understanding motion. Troll Associates. Made by the Lunaflick Company, Ltd. 4 min., si., color, Super 8 mm., in cartridge. © Troll Associates; 18Apr73; MP24491.

MP24492.

Understanding weight and mass. Troll Associates. Made by the Lunaflick Company, Ltd. 4 min., si., color, Super 8 mm., in cartridge. © Troll Associates; 18Apr73; MP24492.

MP24493.

Air is all around us. Troll Associates. Made by the Lunaflick Company, Ltd. 4 min., si., color, Super 8 mm., in cartridge. © Troll Associates; 18Apr73; MP24493.

MP24494.