@article{57843, recid = {57843}, author = {Loomis, Elisha S.}, title = {The Pythagorean proposition; its demonstrations analyzed and classified, and bibliography of sources for data of the four kinds of proofs.}, publisher = {National Council of Teachers of Mathematics}, address = {Washington,}, pages = {xvi, 284 p.}, year = {1968}, note = {Reprint of the 2d ed., 1940.}, url = {http://library.usi.edu/record/57843}, }