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2. Nurses' House and Central Office of the Yellow Fever Service, Rio de Janeiro
3. The Central Office of the Yellow Fever Service, Rio de Janeiro
4. Fred L. Soper and Alexander Burke crossing a bridge to inspect the site of a yellow fever infection near Coronel Ponce, Mato Grosso, Brazil
5. Portrait of Mr. Lisboa, village telegraph officer, with Fred L. Soper and Alexander Burke in Coronel Ponce, Mato Grosso, Brazil
6. Wilbur A. Sawyer and Fred L. Soper after the arrival of the airplane PP-CAO in Cuiaba, Mato Grosso, Brazil
7. Group photo after Wilbur A. Sawyer's arrival in Cuiaba, Mato Grosso, Brazil
8. Wilbur A. Sawyer's caravan and guides on the road to Coronel Ponce, Mato Grosso, Brazil
9. Fred L. Soper and Amaral Machado in the doorway of the Health Department building, Bahia, Brazil
10. PP-CAO, the "flying cow" airplane, in Corumba, Brazil
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