Xiao added missing citations to bibliography  over 8 years ago

Commit id: a3a16e1bec8d388189e079036043e2020392fc88

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@article{Paterson_1985,  doi = {10.1190/1.1441884},  url = {http://dx.doi.org/10.1190/1.1441884},  year = {1985},  month = {dec},  publisher = {Society of Exploration Geophysicists},  volume = {50},  number = {12},  pages = {2558--2594},  author = {Norman R. Paterson and Colin V. Reeves},  title = {{Applications of gravity and magnetic surveys: The state-of-the-art in 1985}},  journal = {{GEOPHYSICS}},  }