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Estados Unidos

Top image: Virginia rail; Bottom image: coot. Pintados por Louis Agassiz Fuertes en "American Game Bird"
Screech owls painted by Louis Agassiz Fuertes from "Handbook of Birds of Eastern North America"
Gadwall's painted by Louis Agassiz Fuertes from "A Natural History of Ducks"
Scarlet tanager painted by Louis Agassiz Fuertes from "Citizen Bird"
Wild animals of North America
Title page of "Contributions from the United States National Herbarium v. 26, part 8"
Mosses of Western Mexico Collected by Mrs. Ynes Mexia from "Journal of the Washington Academy of Sciences, v. 18 no. 21."
Studies of American Plants por Paul C. Standley from "Publication. Field Museum of Natural History. Botanical series. v 4, no. 8"
Table of contents from "Contributions from the Gray Herbarium of Harvard University, v. 45"