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By: Pennsylvania Horticultural Society.Edition:Publication info: Philadelphia, PA, Pennsylvania Horticultural Society,Volume: v.1:no.1-6 (1972-1973)Series:Holding Institution: Pennsylvania Horticultural SocietySubjects: Delaware River Valley Delaware River Valley (N.Y.-Del. and N.J.) Gardening Horticulture Middle Atlantic States Periodicals United StatesBHL Collections: Expanding Access to Biodiversity Literature