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22. [Airplane spraying insecticide in an effort to kill malaria mosquitos]
23. Foreign quarantine inspection and spraying
24. Dr Button learned aviation medicine and the spirit of the Mississippi River
25. Visit to Mali by PHS Surgeon General William Stewart following ceremony in Ghana
26. U.S. Public Health Service aircraft ... used for measuring airborne radioactive materials from nuclear weapons testing
27. Idiot ropea
28. [First person to board the arriving plane at Kennedy International Airport in New York City is a foreign quarantine inspector of the Public Health Service]
29. [Dr. Donald Fredrickson travels to Mt. St. Helens]
30. [A PHS physician stands at the bottom of the steps to an airplane]
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