Haas critical report of Bruckner Symphony No. 2 - public domain?

[Bhm]

Hello,

In principle, of course, the entire Alte Gesamtausgabe of Anton Bruckner is already available on IMSLP. However, in an essay linked to on the Symphony No. 2 work page, Benjamin-Gunnar Cohrs mentions that Robert Haas prepared a critical report for the Symphony No. 2. Cohrs mentions that this critical report is of interest as including the only (up-to-that-time) complete documentation of sources for the work so far. The copy of the Symphony No. 2 currently on IMSLP - even on the AGA work page (#562918) - is of the score only.

Several scores from the AGA work page do include the critical report. I have not yet reviewed the critical report for this volume, but I am assuming that it is similar to those included in other volumes of the AGA. That is, it includes a review of sources, version history, and so on - things that can be hardly considered "original material."

The source where I found a copy of the complete score - https://bcul.lib.uni.lodz.pl/dlibra/doccontent?id=24170 - claims outright that it is public domain in full. Of course, that is not necessarily correct, so I am asking the copyright reviewers here whether this edition can indeed be freely shared (presumably on the AGA work page).

[Sallen112]

Since Robert Haas died before 1972, he is in the public domain in Canada and his contributions are eligible on here.