Margaret Wirrpanda played a significant role in the 1967 Referendum movement as part of her efforts towards Aboriginal rights. Alongside her mother and sisters, she worked with the Federal Council for the Advancement of Aborigines and Torres Strait Islanders (FCAATSI) to help win approval for the referendum. This movement was a crucial step in the recognition of Aboriginal people in Australia.
For more detailed information, you can refer to Margaret Wirrpanda's Wikipedia page.