@article{15133,
      author = {Sinkankas, John.},
      url = {http://library.usi.edu/record/15133},
      title = {Gem cutting; a lapidary's manual.},
      publisher = {Van Nostrand},
      recid = {15133},
      pages = {297 p.},
      address = {Princeton, N.J.,},
      year = {1962},
}