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Spectro Biology


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1938 Covers radio-activity, light rays, and rays of the solar spectrum. Finely made drawings and diagrams make it easy for the reader to obtain a full grasp of the subject. This may lead the way to a new era in medical technique and, even may be able t.




Miscellaneous Essays


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Eminent Europeans


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No Longer Poles Apart


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Dantzig & Poland


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Poland and the Poles


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