Abbreviationes
BA
BAtlas
Barrington Atlas of the Greek and Roman World, with Map-by-Map Directory (R.J.A. Talbert ed.; Princeton and Oxford) (Vicipedia)
BiGr
Bibl. gr.
Bilblia graeca - Novum Testamentum
Christian Greek Scriptures (New Testament)
BiLa
Bibl. lat.
Bilblia latina - Vulgata
BL
Bühl
Constantinopole and Rome: Personification of Cities in Late Antique (Zurich)
cap
lit.cap.
litteras capitalis
capital letters
CIL
CIL
Corpus Inscriptionum Latinarum
DE
Dura Europ.
Dura-Europos - clypeus romanorum
The Dura-Europos stages map is the fragment of a map discovered in Dura-Europos. (Vicipedia)
DN
Dionys.
Dionysius Halicarnassensis, Antiquitates Romanae
FGH
Fragm. Grec. Hist.
Fragments of Greek Historicians (Berlin and Leiden)
gr
Fon.Gr.
Fontes Graeci
greek sources
HCG
Hierocl.
Hierocles Grammaticus Synecdemus
'Synekdemos' of Hierocles - a table of divisions of the Byzantine Empire and lists of the cities (Vicipedia)
HR
Hieros.
see Itin. Burd.
ICMP
IsidChar
Isidorus Characenus - Mansiones Parthicae
la
Fon.Lat.
Fontes Latini
latin sources
lac
lac.
lacus
LXX
Septuag.
Biblia hebraica - Septuaginta
ND
Not. dign.
Notitia Dignitatium
NE
Notitia episc.
Notitiae Graecae Episcopatuum
NO
Not. Imp. Occ.
Notitia imperii occidentalis
PC
Procop.
PD02
A.V. Podossinov
Восточная Европа в римской картографической традиции
Possodinov - Eastern Europe in Roman Cartographic Tradition
PL
Plin.Nat.Hist.
C. Plinius Secundus maior - Naturalis historia
SC
Scyl.
SP
Steph.
Stephani Byzantii Ethnicorvm
For a list of Roman Provinces look here