I have been searching for the Albert Petrak roll listings which used to
be on http://www.rprf.org/  They seem to have gone.  I have looked at
the University of Maryland site but, although there is a lot of piano
interest there, I can't find the roll listings.  Also, some clicking on
published links leads to a Christian bookshop.

Best wishes to all,
Robin Cherry

 [ Albert Petrak, founder of the Reproducing Piano Roll Foundation,
 [ passed away in 2014.  A nice remembrance by his employer is at
 [ http://www.mmdigest.com/Archives/Digests/201401/2014.01.26.02.html 
 [ -- Robbie

 [ Some information was archived from the site by archive.org. You
 [ can browse here:  https://web.archive.org/web/*/http://www.rprf.org/ 

 [ The rollography seems to have been captured more than once:
 [ https://web.archive.org/web/20140412220221/http://www.rprf.org/Rollography.html