Texas Parks and Wildlife (1970) : 38x5

Sharks are under threat from a global appetite and unregulated fishing. See how biologists study shark health and behavior in the Gulf of Mexico. Visit a ranch in the Panhandle that preserves delicate grasslands, springs, and a long human history within its scenic hills and canyons. Some visit parks to escape technology, but a few folks like to bring it along and do a little broadcasting.