Phillips, Bill - "The Technology of Fly Rods"
Frank Amato Publications, Portland, OR, 2000. Soft cover. 1st Edition. 116pp; illustrated with b/w photos, drawings & charts; foreword by Ernest Schwiebert. With chapters on history of fly rod technology; U.S. fishing rod patents; fly rod manufacturing processes; materials properties; casting the line and fly; etc.
A scarce book due to the publisher's small print run.