Caption: Mathematical Models by Arnold Emch - Series 2 (1923)
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LIBRARY UNIVERSITY OF ILLINOIS URBANA
UNIVERSITY OF ILLINOIS BULLETIN Issued Weekly Vol XX June 18, 1923 No. 42 [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.]
MODELS II SERIES BY ARNOLD EMCH
PUBLISHED BY THE UNIVERSITY OF ILLINOIS, URBANA