Books by John Hecker:
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Hecker, John: The Scientific Basis of Education (page images at MOA)
Additional books by John Hecker in the extended shelves:
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Hecker, John: The scientific basis of education demonstrated (New York, 1866) (page images at HathiTrust)- Hecker, John: The scientific basis of education, demonstrated by an analysis of the temperaments and of phrenological facts, in connection with mental phenomena and the office of the Holy Spirit in the processes of the mind: in a series of letters, to the Department of public instruction in the city of New York. (A. S. Barnes & co., 1868) (page images at HathiTrust)
- Hecker, John: The scientific basis of education demonstrated. By an analysis of the temperaments and of phrenological facts, in connection with mental phenomena and the office of the Holy Spirit in the processes of the mind: in a series of letters, to the Department of public instruction in the city of New York, by John Hecker. (The Author, 1867) (page images at HathiTrust)
- Hecker, John: The scientific basis of education : demonstrated by an analysis of the temperaments and of phrenological facts, in connection with mental phenomena and the office of the Holy Spirit in the processes of the mind: in a series of letters, to the Department of public instruction in the city of New York (A.S. Barnes & Co., 1868) (page images at HathiTrust)
- Hecker, John: The scientific basis of education demonstrated. By an analysis of the temperaments and of phrenological facts, in connection with mental phenomena and the office of the Holy Spirit in the processes of the mind: in a series of letters, to the Department of public instruction in the city of New York, by John Hecker. (The Author, 1867) (page images at HathiTrust)
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