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The following HTML text is provided to enhance online readability. Many aspects of typography translate only awkwardly to HTML. Please use the page image as the authoritative form to ensure accuracy. 1971 Zoogeographic affinities of the Tertiary marine molluscan faunas of northeastern Brazil. Simposio Brasileiro de Paleontol. Acad. Brasileiro Ciencias Anais 43 (Suppl.): 119-24. 1973 Affinities of Miocene marine molluscan faunas on Pacific side of Central America. Inst. Centrolamericano Investigacion y Technol. Indust. Publ. Geol. 4:179-87. 1974 The Miocene Caribbean faunal province and its subprovinces. Contributions to the geology and paleobiology of the Caribbean and adjacent areas. Naturforschende Gesellshaft in Basel Verhandlung 84:209-13. 1976 Age of the El Salto Formation of Nicaragua. Inst. Centroamericano Invest. y Technol. Indust. Publ. Geol. 5:18-21. A massive Oligocene (?) pycnodonteine oyster from Costa Rica. J. Paleontol. 50:851-57. 1978 Distribution of Tertiary marine molluscan faunas in southern Central America and northern South America. Univ. Nacional Autonoma de México. Inst. Geol. Bol. 101:153-65. With R. H. Stewart and J. L. Stewart. Geologic map of the Panama Canal and vicinity, Republic of Panama U.S. Geol. Surv. Misc. Invest. Ser. Map no. 1-12132, 1:100,000. 1957-82 Geology and paleontology of Canal Zone and adjoining parts of Panama: A contribution to the history of the Panama land bridge. U.S. Geol. Surv. Prof. Pap. no. 306, chapters A-F, 759 pp.
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