Citation: Ej. Larsen et Wj. Ripple, Aspen overstory recruitment in Northern Yellowstone National Park during the last 200 years, USDA ROCKY, (18), 2001, pp. 345-346
Citation: Rd. Quinn et L. Wu, Quaking aspen reproduce from seed after wildfire in the mountains of southeastern Arizona, USDA ROCKY, (18), 2001, pp. 369-376