Bruce, Robert V.. Bell: Alexander Graham Bell and the conquest of solitude / Robert V. Bruce . - Ithaca : London : Cornell University Press, 1990 . - xi, 564 p. ill. 23 cm. К.: Бібліогр. : с. 501-503, Index ISBN: 0-8014-9691-8 Subjects--Personal Names: Bell, Alexander Graham 1847-1922