GENERAL
EMPIRE
A1 - A84
P1 - P31W
PROVISIONAL GOVERNMENT
P32 - P44
R.S.F.S.R.
P48 - P180
SOVIET UNION
P181 - P246
FX10 - FX NL
RUSSIAN FEDERATION
P247 - P280
REGIONAL
NORTH RUSSIA
S101 - S195
NORTHWEST RUSSIA
S201 - S244
UKRAINE & CRIMEA
S293 - S380
SOUTH RUSSIA
S381 - S445A
NORTH CAUCASUS
S447 - S600D
TRANSCAUCASIA
S601 - S769
SIBERIA & URALS
S771 - S990
RUSSIAN CENTRAL ASIA
S1026 - S1175
EAST SIBERIA
S1181 - S1313
