This is a great find… the ABA’s AM assignment maps from 1992. One page for each AM frequency showing all stations and their coverage:
Awesome find. I lift my hat to you Sir.
If you haven’t heard of it already, you might also be interested in fmscan.org, which has the same thing but for current data and in an interactive format.
To get to this, on the front page, press AM, frequency list, single frequency then ‘OK’.
Here’s 531 kHz for example:
You can do the same for FM also.
Here are some coverage maps for Brisbane: