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by Tarbuck, Edward J.; Lutgens, Frederick K.; Tasa, Dennis G.
by Lutgens, Frederick K.; Tarbuck, Edward J.; Tasa, Dennis G.
by American Geological Institute, AGI; NAGT - National Association of Geoscience Teachers; Cronin, Vincent; et al.
by Hess, Darrel; Tasa, Dennis G.
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