Best, Jane Evans, The Groff Book, Volume 2, A Continuing Saga, Ronks, PA: Groff History Assiciates, 1997. NYPL APV (Groff) 86-1589 v2. Information from this source tagged as [Ref: Best GROFF p[0-9]*].
Sources for birth and parent Information
parents:
John GROFF & Catharine ___ [Ref: Best GROFF p99]
Sources with Information about marriage to Henry BAKER