WoRMS source details
Heron-Allen, E.; Barnard, J.E. (1918) A demonstration on the application of X-rays to the determination of the interior structure of microscopic fossils, particularly with reference to the dimorphism of the nummulites. Geological magazine (decade 6), 5: 90-92.
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Heron-Allen, E.; Barnard, J.E. (1918) A demonstration on the application of X-rays to the determination of the interior structure of microscopic fossils, particularly with reference to the dimorphism of the nummulites. Geological magazine (decade 6), 5: 90-92.
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Pegidia papillata Heron-Allen & Earland, 1918 accepted as Pegidia dubia (d'Orbigny in Fornasini, 1908) (original description)
