Library of Congress
Loc: Alexander Graham Bell Family Papers
All the primary source documents of the Graham Bell Family can be found at this Library of Congress site. An exhaustive site that is interesting to peruse.
US National Archives
Nara: Teaching With Documents: Telephone and Light Patent Drawings
A lesson plan about Alexander Graham Bell's patent for the telephone and Thomas Edison's patent for the electric lamp. Contains good background information and historically pertinent documents. It also discusses the role corporations...