TRIANGLES. Review Educational Films. 6 min., sd., color, Super 8 mm. (Third level series) Loop film. © Review Educational Films, Inc.; 1Sep71; MP22294.

TRIP STEEL. Thorne Films. 5 min., si., color, Super 8 mm. Loop film. Produced in collaboration with U.S.A.E.C. NM: compilation authorship. © Thorne Films, Inc.; 1Dec70: MP22279.

TRIPLE BEAM BALANCE. See

BASIC LABORATORY TECHNIQUES.

THE TROLLEY, BY GOLLY. Dennis S. Johnson. 23 min., sd., color and b&w, 16 mm. NM: compilation & addition. © Dennis S. Johnson; 29Dec71; MP22686.

THE TROUBLE WITH ICE. Boy Scouts of America. 10 min., sd., color, 16 mm. © Boy Scouts of America; 10Dec71; MP22124.

TROUBLE WITH TROUBLE. See

BONANZA.

TROUBLE WITH TRUTH. See

FIRST THINGS: THE TROUBLE WITH TRUTH.