Raptor Research News, Volume 5, Number 4 (1971)
- Notes, News, and Queries. 106-107.
- Estimations Relative to Birds of Prey in Captivity in the United States of America. 108-122.
- Roger Thacker
- Research Planning Conference on Peregrines and Other Birds of Prey Cornell University, Ithaca, New York, November 7-9, 1969 - Part 2. 123-131.
- Keith Hodson
- Sex Determination in Birds of Prey By Laparotomy. 132-135.
- Phillip T. Lawson, Kittle Earl L.