Biodiversity Heritage Library
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By "Preston, Howard W. (Howard Willis), 1859-1936"
Illustrated key to the wild and commonly cultivated trees of the northeastern United States and adjacent Canada based primarily upon leaf characters /
By: Collins, J. Franklin - Preston, Howard W.
Publication info: Toronto :McClelland and Goodchild,c1912.
Contributed by: Canadiana.org (archive.org)