MARSHES. See

ECOLOGICAL IMBALANCE: SIX SYSTEMS DISTURBED.

AN INTRODUCTION TO ECOLOGY: SIX BASIC SYSTEMS.

MARVIN'S MANHOLE. See

TELL ME A STORY.

MASACCIO (Filmstrip) Herbert E. Budek Films & Slides. 14 fr., color, 35 mm.

Credits: Arrangement & text, Carol A. Peterson.

© Herbert E. Budek Films & Slides; 1Mar67; JP12953.

MASOLINO DA PANICALE (Filmstrip) Herbert E. Budek Films & Slides. 13 fr., color, 35 mm.

Credits: Arrangement & text, Carol A. Peterson.