Hallische Händel-Ausgabe

The Hallische Händel-Ausgabe is a multi-volume collection of the works of George Frideric Handel. It was first published in the 1950s: initially as an adjunct to the HG edition, but by 1958 as a collected edition in its own right. The collection's abbreviation of "HHA" can be used to identify individual works by Handel, for example Handel's Messiah can be referred to as "HHA i/17". For practical use, the HHA numbering of Handel's works has been superseded by the HWV numbering system.