@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},
}