I don't know.
I would have thought their record keeping system (if they even had one) would have been very rudimentary before the last say; 100 years.
They keep the knowledge in their heads and souls then pass it on through sand paintings, rock paintings (now dot paintings in acrylic), song and ceremony.
If you go to Uluru it's part of the cultural tour ,learning how the locals treat the land
TJUKURPA
For Anangu the Uluru and Kata Tjuta landscape is TJUKURPA; the body of law, history, knowledge, religion and morality that binds people and country.
In the beginning, TJUKURITJA (ancestral beings) travelled widely across the country, shaping the landscape as they went. Trees, mountains and living creatures were all created by TJUKURITJA on these journeys, and some of their spirit remains behind. The actions of TJUKURITJA established the code of interpersonal behaviour and management of country practices followed by Anangu today.
Anangu know that TJUKURITJA are found in red sand plains and desert oaks as well as in the waterholes and the animals which live there. Anangu look at the landscape and all the living creatures and see visible evidence that TJUKURITJA still exist (Parks Australia & Mutitjulu Community Inc 1995 p5).
Imprints of TJUKURITJA are visible at Uluru. For example, when the Mala (rufous hare wallaby) men came from the north they brought a ceremonial pole. This pole can be seen as an almost detached curved pillar of stone on the north-western corner of the rock. Mala women gathered food for the ceremony. The women and the NYUMA (seed cakes) are visible as small stones on top of Taputji, a small separate outcrop at Uluru's north-eastern side.
Wintalyka (mulga seed) men were enraged when the Mala men declined an invitation. They used powerful magic to construct an evil monster called Kurpany. Kurpany was sent to wreak havoc on the Mala ceremony. The Mala women camped for the night and did not hear the monster approach. Luunpa, the Kingfisher woman who lives at Ininti Waterhole, screamed out a warning just in time.
Luunpa still keeps watch at Ininti Waterhole but she is now a large rock. Just above her, Kurpany's footprints are deeply impressed into the rock, striding east and south. The attack on the Mala men left spear holes in the rock face.