by Harry M. Keal and Clarence J. Leonard

J. Wiley [1959]

v. 3

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by Harry M. Keal, Nancy S. Phelps, Clarence J. Leonard

Wiley , Chapman c1922-c1923 Cass technical high school series

v. 1 , v. 2 , v. 3

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by H. M. Keal and C. J. Leonard

J. Wiley 1921 The Wiley technical series for vocational and industrial schools

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