@article{53933,
      author = {Blumenthal, Leonard M. and Menger, Karl,},
      url = {http://library.usi.edu/record/53933},
      title = {Studies in geometry},
      publisher = {W. H. Freeman},
      recid = {53933},
      pages = {xiv, 512 p.},
      address = {San Francisco,},
      year = {1970},
}