Das nationalsozialistische Lagersystem, 1990 p. 785 (Birkenau (=Brzezinka, Auschwitz II))
Encyc. Judaica (under Auschwitz: Birkenau (in Polish: Brzezinka, the name of the neighboring hamlet) or "Auschwitz II")
The German extermination camps of Auschwitz and Birkenau, 1944 p. 9 (The district now called Birkenau was, and is still, called "Rajska" [i.e., Rajsko] by the local population) p. 30 (Rajsko (Birkenau) [n.b.: the "R" is misprinted and may be read as "B" which may explain the old catalog heading "Bajsko (Concentration camp)" as used on the record for this work])