If you can't find the journal you need online, you can also search for print issues. If a print journal is available, it will list the Library branch it is located in under Location.
Issues of journals published before 1990 are usually stored off-campus at the ANU Print Repository. To access these, go to the item record and click on Print Repository under Find in Library and you will be prompted to fill in a request form. Make sure you are logged in!