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by Editor: Derek Briggs (Yale University); Editor: Peter R Crowther (Keeper of Geology, Ulster Museum)
by Stevenson, Robert Louis; Crowther, Peter (RTL); Lubach, Vanessa
by Lake, Peter; Crowther, Paul
by Crowther, Peter
by Peter Crowther
by Peter Lake; Paul Crowther
by Roberts, Gillian; Crowther, Peter