@article {Ballard1975a,
	title = {{Dive into the great rift}},
	journal = {National Geographic Magazine},
	volume = {147},
	number = {5},
	year = {1975},
	pages = {604{\textendash}615},
	keywords = {HOV Alvin (Human Occupied Vehicle)},
	issn = {0027-9358},
	author = {Ballard, R D}
}
