@misc{indiciaeecc11bef71e6, title = {Composition of the crust in the Grenville and Appalachian Provinces of North America inferred from VP/VS ratios}, author = {G. Musacchio and Walter D. Mooney and James H. Luetgert and Nikolas I. Christensen}, year = {1997}, doi = {10.1029/96jb03737}, url = {https://pubs.usgs.gov/publication/70210154}, note = {Source identifier: 70210154} }