Australia's Oldest Marsupial Fossils and their Biogeographical Implications Beck, Robin M. D. ; Godthelp, Henk ; Weisbecker, Vera ; Archer, Michael ; Hand, Suzanne J. Abstract Publication: PLoS ONE Pub Date: March 2008 DOI: 10.1371/journal.pone.0001858 Bibcode: 2008PLoSO...3.1858B