Executive Order 5537—Potash Restoration No. 9, California
So much of the order of February 21, 1913, creating Potash Reserve No. 2, California No. 1, as affects the lands hereinafter described is hereby revoked:
Mount Diablo Meridian
T. 25 S., R. 43 E., sec. 31, lots 4 and 9.
The White House,
January 21, 1931.
Herbert Hoover, Executive Order 5537—Potash Restoration No. 9, California Online by Gerhard Peters and John T. Woolley, The American Presidency Project https://www.presidency.ucsb.edu/node/361174