Ahm, type in 'Indigenous' then AC.  The Roth stuff should be available via MU for starters but its an anth paper so if not there, it may be at a uni that has an anth/arch Faculty.  There is a recent study of Roth stuff too by Iain Davidson. My papers etc come from Indigneous studies units from several different unis so not sure they would be in published journals as such though some would be though I have numerous (maybe 300 arch papers on Indigenosu Oz).  Approach the Humanities faculty at MU maybe or the head Prof at any uni that offers Indigneous Studies quals and ask can wik have some content so that what goes up isnt total nonsense.  Not all goes on the databases but gets included in different 'Indigenous Studies readings' that are course materials.  

You could try 'Archaeology in Oceania' via JSTOR I think, or delve through Cambridge Uni journals available via Oz databases, etc or 
if you have access to MU, u then have acess to their library so they should maybe have some decent texts.  Try using them.  On the MU catalogue, try using the archaeology/anthropology database search.  Does MU do arch/anth?  try Oz history too and you may find a journal saying Indigneous people are an urban myth.