by George Bishop Sudworth
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Check list of the forest trees of the Un...
The spruce and balsam fir trees of the R...
Trees of the United States important in ...
"Colombian mahogany" (Cariniana pyriform...
Biodiversity and sustainable use of Kyrg...
Growing Walnuts
A study of the acidic constituents of th...
Germination energy and germination capac...
Controlling walnut husk flies
Blackline and rootrots of Persian walnut...