Copyright of bird-song recordings held by the Cornell Laboratory of Ornithology and the Borror Laboratory of Bioacoustics.
Booklet entitled, "Birding by ear : a guide to bird-song identification," by Richard K. Walton and Robert W. Lawson with an editor's note by Roger Tory Peterson and illustrations by John Sill ; sponsored by the National Audubon Society, the National Wildlife Federation, and the Roger Tory Peterson Institute.
ISBN's differ on discs and on container.
Performer
Narration by Richard K. Walton and Robert W. Lawson.
