McGuiness founded and was responsible for
The Koorier, which was the first Aboriginal-initiated national broadsheet newspaper (later known as
National Koorier and then
Jumbunna).
The Koorier and
Jumbunna were published by the Victorian Aborigines Advancement League (VAAL), while the
National Koorier was the mouthpiece of the National Tribal Council. and
Bob Maza were significant contributors to the paper. Like
Identity, published in
Perth, the paper was used to stimulate political activity, and to disseminate messages in and beyond the Indigenous public sphere, to educate the non-Indigenous Australian public. Young activist
Robbie Thorpe, inspired by McGuinness' publication, later produced
The Koorier 2 and later
The Koorier 3, published by the Koori Information Centre. ==Films==