@article{1386025,
      author = {O'Brien, Michael J. and Shennan, Stephen.},
      url = {http://library.usi.edu/record/1386025},
      title = {Innovation in cultural systems : contributions from  evolutionary anthropology /},
      publisher = {MIT Press,},
      recid = {1386025},
      pages = {1 online resource (xi, 284 pages) :},
      address = {Cambridge, Mass. :},
      year = {2010},
}