Thematic index numbers for instrumental works are those found in Christoph Graupner : thematisches Verzeichnis der musikalischen Werke : Graupner-Werke-Verzeichnis, GWV : Instrumentalwerke, e.g., [Overtures, GWV 464, G major]
New Grove (Graupner, (Johann) Christoph; b. Jan. 13, 1683, Kirchberg, Saxony, d. May 10, 1760, Darmstadt; German composer)