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- [21] ECUADOR. Report from Guayaquil-Inspection of vessels-Plague in Peru- Yellow fever on steamship Colombia at Callao-Yellow fever and smallpox at Guayaquil-Vaccination to be enforced on vessels bound for ports in the United States and Republic of Panama PUBLIC HEALTH REPORTS, 1906, 21 (13) : 309 - 310
- [29] YELLOW FEVER IN PANAMA - HISTORICAL AND CONTEMPORARY AMERICAN JOURNAL OF TROPICAL MEDICINE AND HYGIENE, 1952, 1 (03): : 436 - 456