Complex sentence: Dictionaries have been produced by Beulah Lowe, David Zorc and Michael Christie, and there are several grammars of Yolngu languages by Jeffry Heath, Frances Morphy, Melanie Wilkinson and others.
Split into simpler sentences: Dictionaries have been produced by Beulah Lowe, David Zorc and Michael Christie. There are also several grammars of Yolngu languages by Jeffry Heath, Frances Morphy, Melanie Wilkinson and others.