Author: SPAENHAUER, F.
Title: Petrographie und Geologie der Grialetsch-Vadret-Sursura-Gruppe (Graubünden).
Description: 1932. Reprint Schweiz. Min. Petr. Mitt. 12-1; pp. 27-146, 5 fig. 2 photoplts. h.t. 2 plts. h.t. with geol. map and sections folding-out. Orig. wrps. with libr. stamp, very good.

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