The next edition is being prepared now and will be published in early January.
A second edition was prepared by Gray and published in 1860.
Critical editions were prepared in the 1960s, and a Russian translation.
These were copied on the plates when the published edition was prepared in 1863.
A second edition prepared by him was published post mortem in 1830.
"Twenty-eight thousand professional hours go into preparing an average new edition."
It fell to Knott to prepare a third edition in 1904.
A generation or two later, people came to understand that Bruckner's time was his own, and new editions were prepared.
Clark went on to prepare a revised, expanded second edition that was published in 1978.
He is currently preparing a similar edition in Italian and English.