Ancestry.com, "Massachusetts, U.S., Town and Vital Records, 1620–1988," database with images Ancestry (https://www.ancestry.com/search/collections/2495), citing Town and City Clerks of Massachusetts, Massachusetts Vital and Town Records (Provo, UT: Holbrook Research Institute (Jay and Delene Holbrook)).
Westford Church Records: > Westford > Church Records, with Births, Marriages, and Deaths