The Rough Collie AKA The Lassie Dog: everything you need to know | TrustedHousesitters.com
Smooth Collie - zooplus Magazine
Collie Dog Breed Information
Collie (Rough) Dog Breed Information | Purina
Smooth Collie - Wikipedia
Rough Collie Grooming: Shedding and Why to Skip Shaves
Collie (Rough) Dog Breed Information | Purina
Blue Haven - Did you know the collie comes in two varieties? The smooth coat and the rough coat. They still require grooming, although the smooth coat is a little less cumbersome
Rough Collie - zooplus Magazine
What Is A Rough Collie? | Lassie Dog Breed | Collie Chatter