If you really want to do so. Others may choose to merely peruse the following link with either a: a passing interest or b: be
somewhat interested and spend a good ten minutes copying a few notes down.
Regardless, here is PERSA. Or for those of us outside the Halls of Academia in glorious Warwickshire, we can call it:
Numbered Soviet Aviation Factories, 1921?1941 A PDF is available at:
http://www2.warwick.ac.uk/fac/soc/economics/staff/faculty/harrison/archive/persa/022fulltext.pdfAnd happy easter to you, Massimo, Audrius, DGM and the rest of the crew.