**Articles:**

- Carmichael, Robert Daniel,
*Who was Who in America***VI**(Marquis, 1969). - H T Davis, Review: The Logic of Discovery by R D Carmichael,
*Isis***15**(2) (1931), 373-376. - L W Griffiths, Review: Introduction to the Theory of Groups of Finite Order by Robert D Carmichael,
*National Mathematics Magazine***13**(7) (1939), 353-354. - R A J, Review: Mathematical Tables and Formulas by Robert D Carmichael and Edwin R Smith,
*Amer. Math. Monthly***39**(1) (1932), 41. - F W Perkins, Review: The Logic of Discovery by R D Carmichael,
*Amer. Math. Monthly***38**(8) (1931), 458-460. - A Schlafly and S Wagon, Carmichael's Conjecture on the Euler Function is Valid Below 10^{10,000,000},
*Math. Comp.***63**(207) (1994), 415-419. - S Wagon, Carmichael's 'empirical theorem',
*Math. Intelligencer***8**(2) (1986), 61-63. - W Weaver, Review: A Debate on the Theory of Relativity by R D Carmichael, W D MacMillan, M E Hufford and H T Davis,
*Amer. Math. Monthly***36**(1) (1929), 38-42.

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