Trappen, Michelle (January 7, 1994). "Marijuana Advocates State Case". christopheriverson.com. The Oregonian. Archived from the original on December 1, 2017. Retrieved November 28, 2017.
"June 22 Portland Hemp Fest Update". MarijuanaLibrary.org. NORML - National Organization for the Reform of Marijuana Laws. May 23, 1996. Archived from the original on December 9, 2011. Retrieved November 28, 2017.
"The War on the War on Drugs". The Oregonian. November 5, 1998. Archived from the original on January 31, 2021. Retrieved January 31, 2021.(Registration required)
"State by State Laws: Oregon". National Organization for the Reform of Marijuana Laws. 2006. Archived from the original on November 17, 2006. Retrieved January 10, 2007.
Schiff, Rachel (November 12, 2007). "Hidden At Hempstalk". Willamette Week. Archived from the original on November 7, 2007. Retrieved December 16, 2008.
"State by State Laws: Oregon". National Organization for the Reform of Marijuana Laws. 2006. Archived from the original on November 17, 2006. Retrieved January 10, 2007.
"June 22 Portland Hemp Fest Update". MarijuanaLibrary.org. NORML - National Organization for the Reform of Marijuana Laws. May 23, 1996. Archived from the original on December 9, 2011. Retrieved November 28, 2017.
Trappen, Michelle (January 7, 1994). "Marijuana Advocates State Case". christopheriverson.com. The Oregonian. Archived from the original on December 1, 2017. Retrieved November 28, 2017.
"The War on the War on Drugs". The Oregonian. November 5, 1998. Archived from the original on January 31, 2021. Retrieved January 31, 2021.(Registration required)
Schiff, Rachel (November 12, 2007). "Hidden At Hempstalk". Willamette Week. Archived from the original on November 7, 2007. Retrieved December 16, 2008.