The Dutchess County Historical Society is the oldest continually published historical journal in New York State. You’ll find a searchable index here.
Dutchess County Historical Society has an extensive list of books and pamphlets for sale. Many back issues of DCHS year books (published since 1914 and containing articles on a wide variety of historical topics) are also available for sale. An index of year book articles (1914-2005) is available for purchase.