Resistance literatureBarbara Harlow, Mia Carter, Xoán Vila Penedo · First published 1986Open the Tome
Trees of the Eastern United States and CanadaWilliam Morehouse Harlow · First published 1942Open the Tome
Fruit key and twig key to trees and shrubsWilliam Morehouse Harlow · First published 1941Open the Tome
Textbook of dendrology, covering the important forest trees of the United States and CanadaWilliam Morehouse Harlow, Ellwood S. Harrar · First published 1937Open the Tome
Twig key to the deciduous woody plants of eastern North AmericaWilliam Morehouse Harlow · First published 1934Open the Tome
