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2. [Counting hookworms in prisoners in Asuncion, Paraguay] (image 2)
3. Hookworm meeting at Wat Sansai, near Chiengmai, Siam
4. Wilbur A. Sawyer and workers from the headquarters of Unit No.1, Amphur Sansai, near Chiengmai, Siam
5. Wilbur A. Sawyer as Director of the Rockefeller Foundation Hookworm Campaign in Australia
6. Hookworm Campaign central office, College Road, Brisbane, Australia
7. Hookworm Campaign central office stockroom, College Road, Brisbane, Australia
8. S. M. Lambert in front of the office of the Hookworm Campaign in Bowen, Queensland, Australia
9. Pineapple plantation near Nambour, Queensland, Australia
10. The Australian Institute of Tropical Medicine, Townsville, Queensland
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