Lindberg, Mark (Spring 2007). "Foundations Have a Stake". Minnesota Council on Foundations. Mcf.org. Archived from the original on January 7, 2011. Retrieved November 25, 2011.
newspapers.com
Hemphill, Jenda (11 Apr 1979). "Fed Up With Taxes?". Argus-Courier. Petaluma, CA. p. 6. Retrieved 30 Jul 2021.
Lindberg, Mark (Spring 2007). "Foundations Have a Stake". Minnesota Council on Foundations. Mcf.org. Archived from the original on January 7, 2011. Retrieved November 25, 2011.