@article{53995,
      note = {First ed. published in 1961 under title: Gemstones and  minerals: how and where to find them.},
      author = {Sinkankas, John.},
      url = {http://library.usi.edu/record/53995},
      title = {Prospecting for gemstones and minerals.},
      publisher = {Van Nostrand Reinhold Co.},
      recid = {53995},
      pages = {xviii, 397 p.},
      address = {New York,},
      year = {1970},
}