Swallows & Martins: An Identification Guide and Handbook [Helm]

Turner, Angela and Chris Rose

The Purple Martin

Layton, R.B.

The Purple Martin: How Citizen Scientists and Colony Landlords Are Saving a Favorite American Bird

Robin Doughty; Rob Fergus

Purple Martin: Birds of North America species account

Charles R. Brown.

What You Should Know About the Purple Martin

Wade, J.L.

The Purple Martin

Layton, R.B.

Stokes Purple Martin Book: The Complete Guide to Attracting and Housing Purple Martins

Stokes, Donald; Stokes, Lillian; Brown, Justin L.

The Audubon Society Guide to Attracting Birds: Creating Natural Habitats for Properties Large and Sm

KRESS, Stephen W.

30 Birds That Will Build in Bird Houses

Layton, R.B.