5 books
Key to New England Trees: Wild and Commonly Cultivated (Classic Reprint)
Illustrated Key to the Wild and Commonly Cultivated Trees of the Northeastern United States and Adjacent Canada: Based Primarily Upon Leaf Characters (Classic Reprint)
Key to the Wild and Commonly Cultivated Trees of the Northeastern United States and Adjacent Canada
Illustrated Key to the Wild and Commonly Cultivated Trees of the Northeastern United States and Adjacent Canada; Based Primarily Upon Leaf Characters
Illustrated Key to the Wild and Commonly Cultivated Trees of the Northeastern United States and Adjacent Canada (1912)