How can I find older Commonwealth of Australia gazettes?
If the gazette you are looking for is older and not listed on one of the current gazette websites, you can find libraries where you can access older issues.
GovPubs: the Australian Government Publications Guide is a guide to selected types of Australian government publications, such as acts, hansards, gazettes and parliamentary papers, located in Australia's national, state and territory libraries.
Its Gazettes page lists the various series of gazettes published since 1901. Choosing the relevant series will allow you to locate a copy in your nearest library. Alternately, the National Library of Australia (NLA) holds copies of all gazettes and operates a Copies Direct service where you can order copies of articles, documents, photographs, maps, etc.