@inbook {Welhan1983,
	title = {{Methane, hydrogen and helium in hydrothermal fluids at 21 degrees N on the East Pacific Rise}},
	booktitle = {Hydrothermal processes at seafloor spreading centers},
	series = {NATO conference series. IV, Marine sciences},
	number = {12},
	year = {1983},
	pages = {391{\textendash}409},
	publisher = {Plenum Press},
	organization = {Plenum Press},
	address = {New York, N.Y.},
	isbn = {0306414821},
	author = {Welhan, J A and Craig, H},
	editor = {Rona, P A}
}
@article {Group1981,
	title = {{Crustal processes of the Mid-Ocean Ridge}},
	journal = {Science},
	volume = {213},
	number = {4503},
	year = {1981},
	pages = {31{\textendash}40},
	issn = {0036-8075},
	doi = {10.1126/science.213.4503.31},
	url = {http://dx.doi.org/10.1126/science.213.4503.31},
	author = {Group, East Pacific Rise Study and Ballard, R D and Craig, H and Edmond, J and Einaudi, M and Holcomb, R and Holland, H D and Hopson, C and Luyendyk, B P and Macdonald, K and Morton, J and Orcutt, J and Sleep, N}
}
@article {Lupton1980,
	title = {{Helium-3 and manganese at the 21 degrees N East Pacific Rise hydrothermal site}},
	journal = {Earth and Planetary Science Letters},
	volume = {50},
	number = {1},
	year = {1980},
	pages = {115{\textendash}127},
	keywords = {HOV Alvin (Human Occupied Vehicle)},
	issn = {0012-821X},
	doi = {10.1016/0012-821X(80)90123-5},
	url = {http://dx.doi.org/10.1016/0012-821X(80)90123-5},
	author = {Lupton, J E and Klinkhammer, G P and Normark, W R and Haymon, R and Macdonald, K C and Weiss, R F and Craig, H}
}
