@article{848300,
      note = {"Approved by the Standing Committee of the IFLA Section on  Classification and Indexing."},
      author = {Lopes, Maria Inês, and Beall, Julianne,},
      url = {http://library.usi.edu/record/848300},
      title = {Principles underlying subject heading languages (SHLs) /},
      recid = {848300},
      pages = {1 online resource (196 pages).},
}