Vocalizations, Food Habits, and Nesting Biology of the Slender-billed Kite with Comparisons to the Snail Kitev. 100No. 4604–616
Beissinger, Steven R., Thomas, Betsy Trent, and Strahl, Stuart D. 1988. "Vocalizations, Food Habits, and Nesting Biology of the Slender-billed Kite with Comparisons to the Snail Kite." Wilson Bulletin, 100, (4) 604–616.