AN INTRODUCTION TO ECOLOGY: SIX BASIC SYSTEMS.

URBAN ECOLOGY: SIX MICROSYSTEMS (Filmstrip) Eye Gate House. Made by Educational Direction. 6 filmstrips, color, 35 mm.

Contents: A paved school yard. 38 fr.--A vacant lot. 37 fr.--A park. 37 fr.--A park pond. 40 fr.--A grass yard. 44 fr.--A construction site. 39 fr.

Credits: General editor, E. Dan Cappel.

© Educational Direction, Inc.; 17Sep70; JP13115-13120.

URBAN LIFE OF ITS PEOPLE, PT. 1-3. See

JAPAN.

URBAN RENEWAL. See

PROBLEMS OF OUR CITIES.

USE OF WATER IRRIGATORS. Teaching Films. 8 min., sd., color, 16 mm. (Prevention and control of dental disease) © Teaching Films, Inc., division of A-V Corp.; 17Dec70; MU8281.