1 videodisc (approximately 40 min.) : sound, color ; 4 3/4 in.
DVD, region 1; stereo., Hi-fi.
Title from container.
Dozers; excavators; loaders; giant forestry machines; graders; and dump trucks - all in exciting non-stop action. Learn what the machines do, and how they do it. Wall-to-wall big machine action that will thrill and delight young and old alike.