Add this copy of An Experimental Study of the Perceptibility and Spacing to cart. $10.00, very good condition, Sold by Common Crow Books rated 5.0 out of 5 stars, ships from Pittsburgh, PA, UNITED STATES, published 1939 by Columbia University.
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Near Fine. Cloth hardbound, clean unmarked text, 108 pp. + appendices. Near Fine copy with minor rubbing to tips and edges (especially the spine-head). Teachers College, Columbia University Contributions to Education, No. 775.
Add this copy of An Experimental Study of the Perceptibility and Spacing to cart. $47.92, new condition, Sold by Booksplease rated 4.0 out of 5 stars, ships from Southport, MERSEYSIDE, UNITED KINGDOM, published 2012 by Literary Licensing, LLC.
Add this copy of An Experimental Study of the Perceptibility and Spacing to cart. $54.36, good condition, Sold by Bonita rated 4.0 out of 5 stars, ships from Newport Coast, CA, UNITED STATES, published 2012 by Literary Licensing, LLC.
