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The University of Chicago. A Method of Photographing the Desintegration of an Atom, and a New Type of Rays. A Dissertation Submitted ... for the Degree of Doctor of Philosophy, Department of Chemistry, by Roger William Ryan

出版	University of Chicago Libraries, 1923
URL	http://books.google.com.hk/books?id=OR1xQwAACAAJ&hl=&source=gbs_api