@article{50728,
      recid = {50728},
      author = {Sidgwick, Nevil Vincent,},
      title = {The electronic theory of valency,},
      publisher = {Oxford University Press,},
      address = {Oxford,},
      pages = {xi, 310 p.},
      year = {1932},
      url = {http://library.usi.edu/record/50728},
}