Byarlea Wiltshire Horn Sheep Stud
- Producers of stud and fullblood commercial wiltshire horn ewes and rams. History, breed information, and show results included.
- http://www.wiltshirehornsheepstud.com/

Crystal Brook Medical Practice
- Primarily describing the medical practice, but also gives information on the township and the hospital.
- http://www.adelaidetooutback.com.au/divisions/rural/posts/midnorth/crystalbrook.htm

Rocky River Ag Services
- Case IH dealer. Information on staff and services available provided.
- http://rockyriverag.ihub.com.au/

Crouch Rural
- Sales and service of John Deere agricultural equipment and Holden vehicles. Details used stock, and specifications for new equipment provided.
- http://www.amds.com.au/crouchrural/

The Brook Caravan Park
- Amenities list and location map included. Pets allowed on leash.
- http://www.parks-sa.com.au/thbcp.html

Walkabout: Crystal Brook
- Town guide includes attractions, tourist information, and list of accommodation.
- http://www.walkabout.com.au/locations/SACrystalBrook.shtml