@book {Stachiw1975,
	title = {{Spherical-shell sector windows of acrylic plastic with 12,000-foot operational depth capability for submersible Alvin}},
	year = {1975},
	pages = {97},
	publisher = {Naval Undersea Center},
	organization = {Naval Undersea Center},
	address = {San Diego, Calif.},
	keywords = {HOV Alvin (Human Occupied Vehicle)},
	author = {Stachiw, J D and Sletten, R}
}
