1. BirdsallJ.E.1948.Grass and legume seed crops in Alberta. Circ.79.Dep. Agric. Gov. Province Alberta. King's Printer Edmonton AB.
2. BortnemR. andA.Boe.2000.Selection for seed color in red clover. p.2.InProc. 16th Trifolium Conference Pipestem WV. 20–22 Jun. 2000.
3. Color characteristics of red clover seed;Dymond J.R.;Proc. Assoc. Off. Seed Anal. N. Am.,1921