> Multivolume work
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Vol. 1. The Northeastern States ; P. 1:
Wild flowers of the United States Vol. 1. The Northeastern States from the Atlantic to Minnesota and Missouri and from the Canadian border to Virginia and Missouri P. 1 Harold William Rickett. Gen. ed.: William C. Steere
New York: McGraw-Hill, 1966-1973
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Vol. 1. The Northeastern States ; P. 2:
Wild flowers of the United States Vol. 1. The Northeastern States from the Atlantic to Minnesota and Missouri and from the Canadian border to Virginia and Missouri P. 2 Harold William Rickett. Gen. ed.: William C. Steere
New York: McGraw-Hill, 1966-1973