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    Melanovanadite, A New Mineral from Mina Ragra, Pasco, Peru
    Waldemar Lindgren
    PNAS August 1, 1921 7 (8) 249-251; https://doi.org/10.1073/pnas.7.8.249
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    Tests for Fluorine and Tin in Meteorites with Notes on Maskelynite and the Effect of Dry Heat on Meteoric Stones
    George P. Merrill
    PNAS June 1, 1918 4 (6) 176-180.1; https://doi.org/10.1073/pnas.4.6.176
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    Low-Temperature Formation of Alkaline Feldspars in Limestones
    Reginald A. Daly
    PNAS November 1, 1917 3 (11) 659-665; https://doi.org/10.1073/pnas.3.11.659
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    Some Minerals from the Fluorite-Barite Vein Near Wagon Wheel Gap, Colorado
    Esper S. Larsen and Roger C. Wells
    PNAS July 1, 1916 2 (7) 360-365; https://doi.org/10.1073/pnas.2.7.360
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    Researches on the Chemical and Mineralogical Composition of Meteorites
    George P. Merrill
    PNAS July 1, 1915 1 (7) 429-431; https://doi.org/10.1073/pnas.1.7.429
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    On the Monticellite-Like Mineral in Meteorites, and on Oldhamite as a Meteoric Constituent
    George P. Merrill
    PNAS May 1, 1915 1 (5) 302-308; https://doi.org/10.1073/pnas.1.5.302

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