The American Polish Lowland Sheepdog Club, Inc. This is where you will find definitive information on the breed.
The American Kennel Club, Inc. The largest U.S. organization devoted to purebred dogs.
Sinclair PONS A highly respected breeder with whom we have worked extensively.
PONs In America A comprehensive site with breeder listings, event listings, and general information.
Tom's PONS Tom Bednarczyk's PON site.  A very nicely crafted site featuring breed information, history, links, and photos.
Aleksandra & Bogusława Paszkowska  
Bratsiostra Polski Owczarek Nizinny  
Kennel Hajko-Nerita  
Seabiotics Products