found: Luërssen, H. Giessen und das Lahntal ... 1910.
found: Bundesrep., T. Hessen, 1979/80:p. 172 (under Landkreis Giessen: On 7-4-79 Stadt Lahn and the former Lahn-Dill-Kreis were dissolved. They were replaced by 2 Kreis: Landkreis Giessen and Lahn-Dill-Kreis; 2 cities: Giessen and Wetzlar; and 3 Gemeinden: Heuchelheim [no publs. in LC], Lahnau [no publs. in LC], and Wettenberg [no publs. in LC])
found: Müllers, 1977:p. 509 (under Lahn: Lahn, Lahn-Dill-Kreis, Hessen; formed by merger of cities Giessen and Wetzlar and (unnamed) Gemeinden on 1-1-77; Lahn-Giessen) p. 276 (Giessen, Stadtt. Lahn; lists 4 places of this name)
found: BGN 8-10-81(Giessen, PPLX (section of Lahn); 50°35ʹN, 8°39ʹE; does not confirm split in 1977)
found: GeoNames, algorithmically matched, 2009(ppl; 50°35ʹ00ʺN 008°39ʹ00ʺE)
found: Doctrina iuris naturae iuridice considerata, 1727t.p. (Giessae : Apud Iohannem Müllerum, 1727) (DLC copy not examined)
found: Britannica.com, accessed via Google, May 25, 2023entry Giessen, Germany (Giessen, city, Hessen Land (state), west-central Germany. It lies on the Lahn River between the Westerwald and Vogelsberg (mountains), north of Frankfurt am Main) - https://www.britannica.com/place/Giessen-Germany
found: Wikipedia, accessed May 25, 2023"Giessen" (Giessen, spelled Gie[szett]en in German, is a town in the German state (Bundesland) of Hesse, capital of both the district of Giessen and the administrative region of Giessen; coordinates: 50°35'N 8°40'E) - https://en.wikipedia.org/wiki/Giessen