Boydston, R.A., Spellman, D.E. 2006. Volunteer potato control in sweet corn with atrazine and mesotrione combinations. Proc. Western Soc. of Weed Sci. 59:71.
Boydston, R.A., Seymour, M.D., Spellman, D.E. 2004. Volunteer potato forecast for the columbia basin 2004. Potato Progress. Washington State Potato Commission. 4(2):1-3.
BOYDSTON, R.A., WILLIAMS, M., PREST, G., SPELLMAN, D.E. CARROT WEED CONTROL - RESEARCH WITH CAPAROL AND NORTON. PROCEEDINGS OF THE PACIFIC NORTHWEST VEGETABLE ASSOCIATION, PASCO, WA. P 81-88. 2003.