@article {Ballard1979a,
	title = {{Return to oases of the deep}},
	journal = {National Geographic Magazine},
	volume = {156},
	number = {5},
	year = {1979},
	pages = {680{\textendash}705},
	issn = {0027-9358},
	author = {Ballard, R D and Grassle, J F}
}
