Caption: Mathematical Models by Arnold Emch - Series 4 (1928)
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*£:?. U N I V E R S I T Y Issued Weekly Vol. XX¥ June 26, 1928 No. 43 [Entered as second-class matter December 11, 1912, at the post office at Urbana, Illinois, under the Act of August 24, 1912. Acceptance for mailing at the special rate of postage provided for in section 1103, Act of October 3, 1917, authorized July 31, 1918.] O F ILLINOIS B U L L E T I N
MODELS IV SERIES BY ARNOLD EMCH