GOBBETT, D.J. & C..B. WILSON
The Oslobreen Series, Upper Hecla Hoek of Ny Friesland, Spitsbergen.
1960. Reprint Geological Magazine XCVII-6; pp. 441-460, 6 fig. 3 plts. h.t. Includes appendix by Gobbett on new species of trilobite. Orig. extract, stapled, very good.
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