Seeds in the organic layers and soil of four beech-birch-maple stands
Graber, R.E., Thompson, D.F.
Seeds in the organic layers and soil of four beech-birch-maple stands - Washington 1978 - 1-8 p. - Seeds, Soil United States Department of Agriculture, Forest Service Research Paper NE-401 .
Seeds in the organic layers and soil of four beech-birch-maple stands - Washington 1978 - 1-8 p. - Seeds, Soil United States Department of Agriculture, Forest Service Research Paper NE-401 .