Frank H.T. Rhodes. Illustrated by Raymond Perlman. Five billion years of history have shaped the earth. Discover the facts for yourself in the pages of this informative guide that covers the entire geologic time-span and presents a fascinating account of the earth's relation to the rest of the universe, the rocks and minerals of which it is made, and the effects of glaciers, gravity , volcanoes, and other forces. 1991. 160 pages. 4" x 6". Soft cover.