Littell, John.  Family Records:  Or, Genealogies of the First Settlers of Passaic Valley (and Vicinity,) Above Chatham with Their Descendants and Ancestors As Far As Can Now Be Ascertained, 1851Feltville, New Jersey:  Stationers' Hall Press, 1852. 
Reprints  A PDF photographic version is available at, 2006.  Several text transcriptions are available at other websites.
Notes  See also John LITTELL Esq. (1779 Nov 28 - d.) g.16 and Littell lineage.

Powell, Jehu Z.  History of Cass County:  From Its Earliest Settlement to the Present Time : with Biographical Sketches and Reference to Biographies Previously Compiled, Volume 1.  Chicago:  Lewis Publishing Company, 1913.
Reprints  A PDF photographic version is available at, 2008.
Notes  Contains a few details for the William Isaac Routh and William Culbertson Routh families, and for the Routh Packing Company.

Routh, Ross Holland.  The Routh Family in America:  A Genealogy.  El Paso, Texas:  Routh, 1976.
__________ .  Routh Family Revisited:  A Genealogy.  El Paso, Texas:  Routh, 1978.
Reprints  There is restricted availability of PDF and eBook versions.
Notes  It appears these are a first and second edition.  The Routh lineage in this website is based on his work, see Credits.  It is unclear whether he published this particular lineage because he is not related to it.

Teetor, Henry B.  The Past and Present of Mill Creek Valley:  Being a Collection of Historical and Descriptive Sketches of that Part of Hamilton County, Ohio.  Cincinnati:  Cohen & Co., 1882. 
Reprints  Knightstown, Indiana:  The Bookmark, 1977.
Notes  Contains details about Henry Tucker and Tucker's Station.

Webber, Philip E.  Zoar in the Civil War.  Kent, Ohio:  The Kent State University Press, 2007.
Notes  Contains many letters Christian Rieker and other fmaily members wrote during the war, and several pictures of various family members.