Most of the following are ambiguous citations in modern literature.

Amiens B Masson
	(cited in Weale-Bohatta 1853. Perhaps related to Masson collection at Paris ENSBA)
Antwerp Karmel
	(cited in GW 5192. Surely a Carmelite something)
Bologna
	M	(listed in Weale-Bohatta as "Bibl. municipale." Could be BCCen or BCCar or Archivio di Stato.)
Bretten
	MH	(Benzing, Lutherbib., 228 & 1119)
Culemberg
	Sem	(cited in Weale 1559) [Culenborg, Kuilenburg, Culemborg, Kulemborg]
Dresden
	K	(cited in W-B 627. Probably Kupferstich-kabinett, but possibly Dresden Klemperer [W-B 811] or Kreuzschule, which is now SLb.)
Erbes-Büdesheim
	GA	(GW 468, which gives Gem.A)
Frankfurt a.M. Rit. Cath.
	(Bohatta, Breviere 1939)
Haddington T
	(cited in Weale-Bohatta 420)
Helmstaedt
	(Weale-Bohatta 304. There's a former Universitätsbibliothek here.)
Krakow
	Cam	(Kamaldul. in GW 5423) Must be a Camaldulian monastery.
Langres
	BD	(unresolved cite from Amiet Missels 1248 & P-2764) Probably Bibliotheque Diocésain.
Louvain
	FacB	(See Polain 871) Probably Faculté des Beaux Artes, Université Catholique de Louvain
Lyons
	BA	(cited in Weale-Bohatta 1051. Maybe Archevêché or Académie des sciences, belles-lettres, et arts.)
Passau
	OBD	(Cited in Karnowka p. xxii)
Prague
	August	(cited in GW 5193) Probably an Augustinian monastery
Rome
	BPia	(cited in Weale-Bohatta 595)
Rotterdam
	RB	Cited as Remonstr. Bibl. in Wieder, p. 170
Schweidnitz
	F	(Cited in W-B 1654. = Swidnica, Poland. Franciscan?)
Toledo ?
	(cited by Noble for Weale-Bohatta 1530)
Torgnon
	AP	(cited in IGI 6606 as Torgnon Arch. Parr.)
Wimpffen a.B.K.
	(cited in Weale-B ohatta 1651. Maybe Städtisches Archiv?)
Worms Lutherb
	(Benzing, Lutherbibl., 940. Probably Lutherbibliothek)

Useful in solving problems with library identification is the World Guide to Libraries, LS: Z 721.I65. Other guides near that call number may also help. Check also GW 8; at the University of Michigan, the first fascicle (which contains most of the library information) is available only in the RBR.