Help on undocumented abbreviations in BDF ?

[Λύχνις Δαν]

Hi ya,

 

  I am looking at this :

 

    (3) Πρίν with the subj. Lk 2: 26 πρὶν ἢ (om. ἤ BW) ἂν (om. ἄν ADW al.) ἴδῃ, however S* here, too, has ἕως ἂν ἴδῃ; 22: 34 πρὶν ἢ ἀπαρνήσῃ AWΓ al., yet SBL ἕως, K al. ἕως οὗ, D ἕως ὅτου; πρὶν ἀκουσθῶσι Herm Sim 5.7.3 A (-θῆναι PMich). With the opt. A 25: 16, s. §386(4). Elsewhere always with the inf. (§395). Ptol. pap. never πρίν or πρὶν ἄν with a finite verb (Mayser II 1, 275, 310).—Rob. 974–8.
 

accord://read/BDF_Greek#4360

 

  Now BW, ADW and SBL are nowhere explained that I can see. I went to my print version and the same appears to be the case there. Does anyone know what they mean ? Also AWΓ. Are they perhaps the "sigla of Tischendorf and Nestle" mentioned at the foot of page xxxvii ?

 

  It seems the might be. Could anyone confirm or explain differently ?

 

Thx a lot,

D