Leonhardt, David. Holding On (April 6, 2008). «In 1955, the physicist William Shockley set up a semiconductor laboratory in Mountain View, partly to be near his mother in Palo Alto. …».
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Markoff, John. Two Views of Innovation, Colliding in Washington (January 13, 2008). «The co-inventor of the transistor and the founder of the valley's first chip company, William Shockley, moved to Palo Alto, Calif., because his mother lived there. ...».
