Herbert Hoover Autographed Stanford Calling Card Signed US President JSA LOAStanford University calling card autographed by the 31st President of the United States of America, Herbert Hoover Signed in black steel tipped fountain pen on a Stanford University, California calling card Calling card is affixed to a letter from Hoover's secretary thanking a supporter for their support Hoover maintained a lifelong affiliation with the world renowned institution, graduating from its very first class in 1891, and later established the