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Selections from Essays on Health-culture and the Sanitary Woolen System
Gustav Jäger
出版Dr. Jaeger's Sanitary Woolen System Company, 1886
URLhttp://books.google.com.hk/books?id=_hYbAAAAYAAJ&hl=&source=gbs_api
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註釋Jaeger espouses his theory that cotton and linen fibers inhibit the health benefits of woolen garments.