van Els, Paul, Oklahoma State University, United States

• Bulletin of the Oklahoma Ornithological Society Vol. 42 No. 4 (2009) - Articles
  First record of brown-headed cowbird parasitism on Cassin’s Sparrow in Oklahoma
  Abstract  PDF
• Bulletin of the Oklahoma Ornithological Society Vol. 42 No. 3 (2009) - Articles
  Capture of gray-headed junco (Junco hyemalis caniceps) in Payne County, Oklahoma
  Abstract  PDF