@article{15685,
      recid = {15685},
      author = {Barnes, Ralph M.},
      title = {Motion and time study: design and measurement of work},
      publisher = {Wiley},
      address = {New York,},
      pages = {xi, 799 p.},
      year = {1968},
      url = {http://library.usi.edu/record/15685},
}