Koford, R.R., B.S. Bowen, J.T. Lokemoen, and A.D. Kruse. 2000. Cowbird parasitism in grassland and cropland in the northern Great Plains. Chapter 27 in: J.N.M. Smith, T. Cook, S.K. Robinson, S.I. Rothstein, and S.G. Sealy, editors. The ecology and managem