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By "American Horticultural Society. "
Plant hardiness zone map /
By: National Arboretum (U.S.) - American Horticultural Society. - United States. Agricultural Research Service.
Edition: Rev. 1965.
Publication info: Washington, D.C. :Agricultural Research Service,
Holding Institution: U.S. Department of Agriculture, National Agricultural Library
Transactions of the American Horticultural Society.
By: American Horticultural Society.
Publication info: [S.l. :The Society],1885-1888.
Holding Institution: New York Botanical Garden, LuEsther T. Mertz Library
BHL Collections: New York Botanical Garden