CHALLENGE IN THE COAL MINES: MEN AGAINST THEIR UNION. See

CBS NEWS SPECIAL.

CHALLENGE OF THE MOUNTAIN. See

LASSIE.

THE CHALLENGE OF THE SALT. Filmakers Studio & Monte Vista Corp. Released by Unidyne Entertainment. 96 min., sd., color, 35 mm. NM: compilation & additions. © Monte Vista Corp.; 28Dec72; LP42336.

CHANGE—TRAINING TEACHERS FOR INNOVATION. Institute for Development of Educational Activities. 29 min., sd., color, 16 mm. © Institute for Development of Educational Activities, Inc.; 15Jan71 (in notice: 1970); MP23942.

CHAOS OR COMMUNICATION. NBC Enterprises. Distributed by Educational Systems Division, Doubleday & Co. 15 min., sd., color, 16 mm. Produced in association with New Concept Productions. Appl. author: Doubleday Multimedia, division of Doubleday & Co., Inc. © NBC Enterprises; 12Nov68; MP24039.

[CHAS. PFIZER & CO. TELEVISION COMMERCIALS] Pfizer, Inc. Approx. 30 sec. each, sd., color, 16 mm. © Pfizer, Inc.

Baby therapeutic. © 30Oct72; MP23968.

Barrier rev. © 31Jan73; MP23826.