English
"In this brochure I have confined myself to the primary argument and indicated the direction in which we may find physical completeness."--p. xii, author's introd · This material has been provided by The University of Leeds Library. The original may be consulted at The University of Leeds Library · The University of Leeds Library
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Ebook · Man's supreme inheritance · Alexander, F. Matthias (Frederick Matthias), 1869-1955, University of Leeds. Library · Internet Archive
Conditioning (psychology) · Habituation (psychophysiology)