Natuurhistorisch Maandblad

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Natuurhistorisch Genootschap Limburg

J. Hofker. (1963). Foraminifera of the Cretaceous of South-Limburg, Netherlands, LXXI: the increase of the pore-diameters in Gavelinopsis involuta (Reuss, 1862) during the later Cr 4 and the Maestricht Tuff Chalk in the Canal Albert region. Natuurhistorisch Maandblad, 52(12), 173–176.