$15.99On Aggression - (Harvest Book, Hb 291) by Konrad Lorenz (Paperback)Target- $49.00Patterns of Behavior: Konrad Lorenz, Niko Tinbergen, and the Founding of EthologyAmazon
- $16.99Behind the Mirror - (Helen and Kurt Wolff Books) by Konrad Lorenz (Paperback)Target
- $3.99Dog Tricks The Pack Leader's Way! : Basic Tricks and Commands for Pack Leaders! (The Cesar Millan & Konrad Lorenz Dog Training Revolution) (Pack Leader Training Trilogy Book 2)Amazon
- $3.99Dog Training The Pack Leader's Way: The Cesar Millan, Konrad Lorenz and B. F. Skinner Revolution (Easy Lessons and Exercises for Beginners) (Pack Leader Training Trilogy Book 1)Amazon
- $12.99Dog Training Book Bundle for Pack Leaders: Volumes 1-3: The Cesar Millan & Konrad Lorenz RevolutionAmazon