He continued his association with Stanford as Professor Emeritus and, on 13 December 1977, a dinner was given there to mark his 90th birthday at which many friends and colleagues gave glowing tributes.
Siya ang pagpapatuloy ng kanyang association sa Stanford bilang Professor Emeritus at, sa 13 ng Disyembre 1977, ang isang hapunan ay ibinigay na may marka ng kanyang ika-90 kaarawan at kung saan maraming mga kaibigan at kasamahan ibinigay pagkinang tributes.