Foliage key to trees and shrubs including those native and introduced species with alternate leaves that are deciduous and simi-evergreen and hardy in New England and New York Thurston, Arthur S. creator text book 1916 1916
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ENG Thesis (M.S.)--Massachusetts Agricultural College, 1916. Horticulture Identification Leaves Masters Shrubs Theses Trees LD3234 .M268 1916 .T544 https://www.biodiversitylibrary.org/bibliography/63611 18238037 10.5962/bhl.title.63611