Roberts, F. Leland. 2007. Investigation into seed collection practices and shrub manipulations to improve sustainable seed yield in wildland stands of bitterbrush (Purshia tridentata). Provo, UT: Brigham Young University. Thesis. 35 p.
Roberts, F. Leland. 2007. Investigation into seed collection practices and shrub manipulations to improve sustainable seed yield in wildland stands of bitterbrush (Purshia tridentata). Provo, UT: Brigham Young University. Thesis. 35 p.