@article{90519,
      recid = {90519},
      author = {Bernal, Ignacio,},
      title = {The Olmec world.},
      publisher = {University of California Press,},
      address = {Berkeley,},
      pages = {xiv, 273 p.},
      year = {1969},
      url = {http://library.usi.edu/record/90519},
}