Showing 1 - 2 results of 2 for search 'J.J. Groen,', query time: 0.71s Refine Results
  1. 1
    The geology of the Valderrueda, Tejerina, Ocejo and Sabero coal basins, Cantabrian Mountains, Spain /
    by Helmig, Harm Moed, 1931-
    Published 1965
    “...J. J. Groen,...”

    Thesis Book
  2. 2
    Lower Devonian brachiopods and stratigraphy of North Palencia (Cantabrian Mountains, Spain) /
    “...J.J. Groen & Zoon,...”

    Thesis Book
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