Dr. Hill is the founder of the PMCA which has been very effective in the conservation of the species.
Carlyle Rogillio, The Nature Society.
Purple Martin Rehabilitation Manual.
Roger Tory Peterson, Houghton Mifflin Co., 1947. A Field Guide to the Birds.
Chris J. Slabaugh SR, A.B.C.A., 1947. Purple Martins "400" Questions and Answers.
Peterjohn, B. G., and J. R. Sauer. 1995.
Purple Martin Population Trends From the North American Breeding Bird Survey, 1966 -1994. Purple Martin Update 6:2-8.
Allen, R.W. and M.M. Nice. 1952. American Midland Naturalist 47(3): 606-665.
A study of the breeding biology of the Purple Martin (Progne subis).
R.B. Layton, Nature Book Publishers, P.O. Box 115, Valley Lee, MD 20692, The Purple Martin.
Richard A Wolinski, Enjoying Purple Martins More.
Don Grussing, How To Control Sparrows.
Godfrey, W.E. 1986. National Museums of Canada. Ottawa.The birds of Canada, Rev. ed..
Kale, H.W.II. 1968. Auk 85: 654-661.The relationship of Purple Martins to mosquito control.
The Purple Martin Web Ring is a very potential source of information on all aspects of the martin and the martin landlord. Among the ring members can be found personal, group, and commercial web sites aimed at you, the person interested in purple martins.