@article{152630,
      note = {Proceedings from a symposium convened by the IGPP Center  for the Study of Evolution and the Origin of Life at the  University of California, Los Angeles, held January 11,  1991.},
      author = {Schopf, J. William,},
      url = {http://library.usi.edu/record/152630},
      title = {Major events in the history of life /},
      publisher = {Jones and Bartlett Publishers,},
      recid = {152630},
      pages = {xv, 190 p. :},
      address = {Boston :},
      year = {1992},
}