@article{18458,
      recid = {18458},
      author = {Richards, Robert H. and Locke, Charles E., and Bray, John  Leighton,},
      title = {A text book of ore dressing,},
      publisher = {McGraw-Hill,},
      address = {New York [etc.]},
      pages = {xii, 570 p.},
      year = {1925},
      url = {http://library.usi.edu/record/18458},
}