@article {70701,
	title = {Correlation of Pennsylvanian Formations of North America},
	journal = {Bulletin of the Geological Society of America},
	volume = {55},
	year = {1944},
	pages = {657-706},
	keywords = {North America, Paleozoic, Sedimentary, stratigraphy},
	author = {Moore, R. C. and Wanless, H. R. and Weller, J. M. and Williams, J. Steele and Read, C. B. and Bell, W. A. and Ashley, G. H. and Cheney, M. G. and Cline, L. M. and Condra, G. E. and Dott, R. H. and Dunbar, C. O. and Elias, M. K. and Glenn, L. C. and Greene, F. C. and Hendricks, T. A. and Jewett, J. M. and Johnson, J. H. and King, P. B. and Knight, J. B. and Levorsen, A. I. and Miser, H. D. and Newell, N. D. and Plummer, F. B. and Thompson, M. L. and Tomlinson, C. W. and Westheimer, Jerome}
}
@proceedings {69106,
	title = {Report of a Symposium on Petroleum Discovery Methods},
	year = {1942},
	pages = {1-164},
	publisher = {American Association of Petroleum Geologists},
	address = {Denver, Colorado},
	keywords = {petroleum},
	author = {Levorsen, A. I.}
}
@article {70981,
	title = {Classification and Nomenclature of Rock Units},
	journal = {Bulletin of the Geological Society of America},
	volume = {44},
	year = {1933},
	pages = {423-259},
	keywords = {Igneous rocks, Metamorphic rocks, Nomenclature, Sedimentary rocks},
	author = {Ashley, G. H. and Cheney, M. G. and Galloway, J. J. and Gould, C. N. and Hares, C. J. and Howell, B. F. and Levorsen, A. I. and Miser, H. D. and Moore, R. C. and Reeside, J. B., Jr. and Rubey, W. W. and Stanton, T. W. and Stose, G. W. and Twenhofel, W.H.}
}
