), " The Recent Progress of the Theory of Vision ", pp. 93-185 in Helmholtz, H., Popular Scientific Lectures, Dover Publications, ( New York ), 1962 first published in German in 1868.
), " The Recent Progress of the Theory of Vision ", pp. 93-185 in Helmholtz, H., Popular Scientific Lectures, Dover Publications, ( New York ), 1962 first published in German in 1868.
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