The only location information on the CDs was B in the code indicating Brisbane. I assume the C indicates Country - everything outside of Brisbane. (searching on line returns the 2 types of codes B and C)
Births to 1919, marriages to 1939 and deaths to 1964 are available on fiche and are held by LDS centres and major libraries etc throughout Australia.
This option seems to be a winner Ernest James Harding buried 26 Sep 1946 aged 82 & in the same grave Maria Agnes 17 Aug 1928 62 years. Toowong Cemetery Brisbane. You may find the babes & some of the girls as well.
If your state library has the Courier Mail on film - funeral notices would probably give the married name of some of the daughters.
Were the parents born in Qld or did they immigrate - immigration records may give information as to where they settled.
Google some of the names - you may find other folks researching the same families.
When all else fails - buying a certificate will give a location.