Strong, Paul I. V., and Richard J. Baker. 2000. "An Estimate of Minnesota's Summer Population of Adult Common Loons." In The Common Loon: Population Status and Fall Migration in Minnesota, edited by Peder H. Svingen and Anthony X. Hertzel, 5–13. Minnesota Ornithologist’s Union Occasional Papers, no. 3. Minneapolis: Minnesota Ornithologists’ Union. http://files.dnr.state.mn.us/eco/nongame/projects/consgrant_reports/1991/1991_stong_baker.pdf