Colby, C B.
Underwater world; exploration under the surface of the sea / by C. B. Colby. - New York : Coward, 1966. - 48 p. : ill.
Discusses skin diving equipment, tells what artifacts can be found under the sea and what can be learned from them, and describes several undersea vehicles.
66007615
Oceanography--Research.
Deep diving.
551.4
Underwater world; exploration under the surface of the sea / by C. B. Colby. - New York : Coward, 1966. - 48 p. : ill.
Discusses skin diving equipment, tells what artifacts can be found under the sea and what can be learned from them, and describes several undersea vehicles.
66007615
Oceanography--Research.
Deep diving.
551.4