Some natural violet hybrids of North America.

At head of title : University of Vermont and State agricultural college.Introduction by G. P. Burns.Mode of access: Internet

The calciferous formation in the Champlain Valley. Bulletin of the AMNH ; v. 3, article 1.

23 p. : ill., maps ; 24 cm.Includes bibliographical references

The Chazy of Lake Champlain. Bulletin of the AMNH ; v. 8, article 21.

p. 305-315 : maps ; 24 cm.Includes bibliographical references.The Valcour Island section -- Isle La Motte section -- The Crown Point section