==See also==*The Foundation Series==References====External links==*The Foundation Trilogy: Notes, Articles, and Links*The History of the Positronic Robot and Foundation Stories Part 1: 1940-1941*The History of the Positronic Robot and Foundation Stories Part 2: 1941-1944*"The Foundation Trilogy," Reviewed by Ted Gioia (Conceptual Fiction)
* The Foundation Trilogy: Notes, Articles, and Links* The History of the Positronic Robot and Foundation Stories Part 1: 1940-1941* The History of the Positronic Robot and Foundation Stories Part 2: 1941-1944* "The Foundation Trilogy," Reviewed by Ted Gioia (Conceptual Fiction)