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The Foraminifera of the Ripley formation on Coon Creek, Tennessee 3360
A Habitable Fluvio-Lacustrine Environment at Yellowknife Bay, Gale Crater, Mars 1932
Studies of Arctic foraminifera 1691
Smithsonian at the Poles: Contributions to International Polar Year Science 1535
The ubiquitous miser’s purse 1319
Thompsonella, a new genus of Crassulaceae from Mexico 1306
Studies of Mexican and Central American plants -- No. 3 1304
Studies of Mexican and Central American plants -- No. 4 1301
Rediscovery of Echeveria carnicolor 1301
A species of Pereskia from Guatemala 1300