Nature and electricity. William Ditzel Productions. 30 sec., sd., color, 16 mm. © William Ditzel Productions; 1Nov72; MP24184.

MP24185.

The Way of our fathers. Humboldt State College Foundation. 33 min., sd., color, 16 mm. Prev. reg. 5Apr72, MU8430. © Humboldt State College Foundation; 2Oct72; MP24185.

MP24186.

Make a mighty reach. I / D / E / A. 45 min., sd., color, 16 mm. © I / D / E / A a. a. d. o. the Institute for the Development of Educational Activities, Inc.; 5Jan67 (in notice: 1966); MP24186.

MP24187.

Lecture number 1. Consultants Associated, Inc. 23 min., sd., b&w, videotape (1/2 in.) (Techniques and aids) © Consultants Associated, Inc.; 1Jun70; MP24187.

MP24188.

Lecture number 2. Consultants Associated, Inc. 23 min., sd., b&w, videotape (1/2 in.) (Techniques and aids) © Consultants Associated, Inc.; 1Jun70; MP24188.

MP24189.