We need to look at Ullman's analysis before you discredit Anderson. If a source is a family Bible and Anderson used this...Ok. Let not pick apart Anderson.
Books: We use these to draw our own Educated conclusions.
Family Records: Family Bibles, vital records, correspondence (letters), memoirs, journals, diaries, unrecorded deeds and wills, diplomas, certificates, and testimonials.
Public Records: Censuses, government records, military, pensions, land bounty records, passport applications, passenger lists, original grants, naturalization or immigration records, records of entry, state, province and local records.
Institutional Records: Church records, cemetery records and inscriptions, educational institutions, societies and fraternal organizations.