Talcott, Alvan. Families of Early Guilford, Connecticut (Genealogical Pub. Co., Baltimore, 1984) is available as from the sources page, for a quick cut-and-paste citation.
Unfortunately, this is not free but is available at many libraries and via Ancestry. Similarly, he does not cite sources, other than a general statement that much came from the Barbour Collection. Despite this, its a great resource for finding possible family relationships and criteria to find source records. My cousin found a copy at a used bookstore; she said it appeared to correspond to what we found in the Erastus Scranton (Scranton, Erastus. A Genealogical Register of the Descendants of John Scranton of Guilford, Conn., who died in the year 1671) genealogy, so he may have copied from many family histories.
