Below are current (May 2020) Primefacts (information sheets/articles) on parasites in livestock (and also one on zoonoses).
As always, check other, reliable sources to make sure the information is still current and accurate, particularly if the articles (to which the links (below) are pointing) were not written in the last few years.
WormBoss, which is part of ParaBoss, is heartily recommended. ParaBoss also includes information on sheep lice and flystrike (as well as ‘worms’) in Australia.
WormBoss / ParaBoss is still current and active (at May 2020), so the information should be up-to-date.
Aspects of parasite management that may change fairly frequently are : drug resistance, new products on the market, and new tests and providers of relevant services.
Worm control in horses
There is this NSW DPI Primefact (written 2010):
Overall it is very good, but it should be read in conjunction with some newer material:
i.e. newer material influenced by the AAEP guidelines.