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22. Letter from Wilbur A. Sawyer to Margaret Sawyer
23. Letter from Wilbur A. Sawyer to Margaret Sawyer
24. Letter from Wilbur A. Sawyer to Margaret Sawyer
25. Letter from Wilbur A. Sawyer to Margaret Sawyer
26. Excerpt from Wilbur A. Sawyer's diary concerning his visit to Colombia
27. Excerpt from Wilbur A. Sawyer's diary concerning his visit to Colombia
28. Excerpt from Wilbur A. Sawyer's diary concerning his visit to Colombia
29. Hookworm Disease as Related to Industry in Australia
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