Author: Helfrich, H.K., 1971.:
Title: Stratigraphie, Tektonik, Petrochemie und montangeologische Züge am Nordrand der zentralen "Norrlandsgeosynklinale". [Sver. Geol. Unders., Ser. C, 654.]
Description: Stockholm. 8vo. Pp. 195, 83 illus. in text, 3 fold. col. maps and 2 pls. of sections in pocket, refs. Orig. stiff wrs.

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