Sport diving : the instructional guide to skin & scuba /
Walker, Morton.
Sport diving : the instructional guide to skin & scuba / Mort Walker. - Chicago : H. Regnery, c1977. - xvii, 315 p. : ill.
0809281767
Skin diving.
Sport diving : the instructional guide to skin & scuba / Mort Walker. - Chicago : H. Regnery, c1977. - xvii, 315 p. : ill.
0809281767
Skin diving.