English language
Published Jan. 12, 1988 by Houghton Mifflin Harcourt Trade & Reference Publishers.
The Flight Identification of North American Migrant Raptors
Pete Dunne, Clay Sutton, David Allen Sibley: Hawks in Flight (1988, Houghton Mifflin Harcourt Trade & Reference Publishers)
English language
Published Jan. 12, 1988 by Houghton Mifflin Harcourt Trade & Reference Publishers.