Map of Aboriginal Australia was developed by Dr David Horton and the
Australian Institute of Aboriginal
and Torres Strait Islander Studies (AIATSIS) in 1994.
I believe that AIATSIS and Dr Horton own the copyright for the map.
You can purchase the map from many different stockists including Dreamtime Kullilla Art.
However, if you want to use the map in your presentations and in particular, student presentations, you can download a jpeg or a pdf (these sites are external to Blacklines and may not have copyright permission to make the map available).