As for 30th Breakthrough Arty Div units.
It was 195th Super Hvy How Bde according to Sharp!
You probably know that Gds Mortar Bde (equipped with rocket launchers) have been added in Breakthrough Arty Division (according to 1944 staff). At the same time Gds Mortar Div have been removed from a Breakthrough Arty corps!
So I am almost sure that 37th Gds Mortar Bde was the regular Gds Mortar Bde of 30th Breakthrough Arty Div!
Thus we have such OOB for 30th Breakthrough Arty Div:
185th Light Artillery Brigade
190th Howitzer Brigade
192nd Heavy Howitzer Brigade
195th Super Heavy Howitzer Brigade
45th Mortar Brigade
34th Heavy Mortar Brigade
37th Gds Mortar Bde
As for "шисбр".
I can not be on 100 percents sure but it could mean "assault engineer/sapper brigade" (Shturmovaya ingenerno-sapernaya brigada).
Thanks, Leonid!
About "шисбр" I've just thought the same... I'm not sure but AFAIR in such brigades there were flame-thrower tanks, sometimes mine-clearing tanks, and other heavy stuff for destroying fortifications.
About 30th BAD: for me this could mean something like that: as the 6th Gds Mortar Div (Katyusha) fought with 2nd UF since Yassy till the end of war, and in April 1945 is mentioned as having only 2 brigades (8th Guards and 33rd), and 30 BAD came to Hungary in September, the 37th Gds rocket brigade could be moved from 6th rocket div to 30 BAD; or the 6th rocket div had only two brigades, with 30th BAD having its own rocket brigade.
Anyway, quite terrible force...
Dear gentlemen Hannes, Rafik, Evgeniy & Oleg: thanks to Your help, as well to Leonid's, I finally managed to collect the OoB for red Army's 2nd & 3rd Ukrainian Fronts for Balaton Battle and beginning of the Vienna operations. If Leonid is the same Leonid I know, (and I presume he is...) I send him the *.doc file with that OoB. If someone of you is interested in that file, please let me know - so I could send it to him as my thanks.
Thank you!
DS