Sparn, E. (1920). Universal catalog of journals of Exact, Physical and Natural Sciences with their corresponding volume or year numbers during the dates of publication. Academia Nacional de Ciencias.
Cita Chicago Style (17a ed.)Sparn, Enrique. Universal Catalog of Journals of Exact, Physical and Natural Sciences with Their Corresponding Volume or Year Numbers During the Dates of Publication. Academia Nacional de Ciencias, 1920.
Cita MLA (8a ed.)Sparn, Enrique. Universal Catalog of Journals of Exact, Physical and Natural Sciences with Their Corresponding Volume or Year Numbers During the Dates of Publication. Academia Nacional de Ciencias, 1920.
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