THE SWAN, THE BEAVER. See

STORIES OF ANIMALS WHICH SHARE AN ENVIRONMENT.

THE SWIMMING HOLE. King Screen Productions. 14 min., sd., color, 16 mm. © King Broadcasting Co.; 23May72; MP22854.

SWIMMING POOL BACTERIA; or, Arnold makes some friends. Dade County School Board. 10 min., sd., color, 16 mm. © Dade County School Board; 21Apr71 (in notice: 1970); MP22385.

SYMBOLS IN MUSIC. See

MUSIC APPRECIATION SERIES.

T

TIA: THE EARLY WARNING SYSTEM OF IMPENDING STROKE. Marion Laboratories. Made by Comprenetics. 31 min., sd., color, 16 mm. © Marion Laboratory, Inc.; 10Jan72; MP22463.

TRS SYSTEM. See

VEHICLE EMISSION CONTROL.