genealog.lc-ma: Books in the on-line Library of Congress catalog with the subject "Massachusetts--genealogy." Additional books, with Mayflower in the title, are listed in
genealog.qmayflwr.
genealog.vital-ma: Where to write for Massachusetts vital records, Massachusetts genealogical and historical societies, and the state archives. Or check
Massachusetts Vital Records Information for more current info on where to write for vital records.
genealog.towns-ma: Names and boundary changes of Massachusetts cities and towns
Tables of Contents, New England Historical and Genealogical Society Register:
From Brian Mavrogeorge, the file
mdlsxndx.zip, 6K zipped, 11K unzipped, a surname index to "Historical Homes and Places and Genealogical and Personal Memoirs Relating to the Families of Middlesex County, Massachusetts"