@article {Holmes1993,
	title = {{Upper crustal densities derived from sea floor gravity measurements: Northern Juan De Fuca Ridge}},
	journal = {Geophysical Research Letters},
	volume = {20},
	number = {17},
	year = {1993},
	pages = {1871{\textendash}1874},
	keywords = {HOV Alvin (Human Occupied Vehicle)},
	issn = {0094-8276},
	doi = {10.1029/93GL00909},
	url = {http://dx.doi.org/10.1029/93GL00909},
	author = {Holmes, M L and Johnson, H P}
}
