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by Perry, Vincent G.; Chambers, Jackson
by Grant, Judith; Jungkunz, Vincent G.
by Vincent, Harl; Piper, H. Beam; Buckner, Bradner; et al.
by Wells, H. G.; Kelvin, Vincent
by Wells, H. G.; Verret, Vincent
by American Geological Institute, AGI; NAGT - National Association of Geoscience Teachers; Cronin, Vincent; et al.
by Duffy; Vincent G.