Natuurhistorisch Maandblad

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Natuurhistorisch Genootschap Limburg

J. Hofker. (1963). Foraminifera from the Cretaceous of South-Limburg, Netherlands. LXIV.: the initial stages of Orbitoides apiculata (Schlumberger) and Lepidorbitoides minor Schlumberger and the difference between the alteral chambers of these two species. Natuurhistorisch Maandblad, 52(3), 40–43.