Source Information

Ancestry.com. A Handbook of conservation [database on-line]. Provo, UT: Ancestry.com Operations Inc, 2005.
Original data: A Handbook of conservation : with special reference to the landscape features in Essex County : a directory to channels and agencies for restoration and conservation of natural and historical features.. Salem, Mass.: Society for the Preservation of the Landscape Features of Essex County, Massachusetts and the Peabody Museum, c1936.