Or when you find a reputable website, look for a section called publications/research/reports/documents, and browse that organization's resources:
Reverse Citation Search to find Indigenous Authors
Use Google Scholar to do a citation search to find Indigenous authors. Indigenous scholars often cite Indigenous research. For example, Indigenous scholars across many disciplines cite the book Decolonizing Methodologies by Linda Tuhiwai Smith.
Google Scholar allows you to do a reverse citation search, which allows you to find resources that cite a specified publication.
1. Open Google Scholar and find the title you want to search, then click "cited by".
2. Select "Search within citing articles" and try performing a keyword search to narrow your results.
3. From those results, look for author self-identification or biographies which identify authors as Indigenous within articles.