@article {Johnson2000a,
	title = {{Density and porosity of upper oceanic crust from seafloor gravity measurements}},
	journal = {Geophysical Research Letters},
	volume = {27},
	number = {7},
	year = {2000},
	pages = {1053{\textendash}1056},
	keywords = {HOV Alvin (Human Occupied Vehicle)},
	issn = {0094-8276},
	doi = {10.1029/1999GL011130},
	url = {http://dx.doi.org/10.1029/1999GL011130},
	author = {Johnson, H P and Pruis, M J and Van Patten, D and Tivey, M A}
}
