Sources on Jewish Communities in this section:

Bereza Kartuska  Byaroza [Bel], Bereza [Rus], Bereza Kartuska [Pol, until 1945], Kartoz-Brezah [Yid], Bereze, Brezah,

Biaroza, Bjaroza, Bereza Kartuskaya, Biaroza Kartuzskaia, Byaroza-Kartuzskaya, Kartusskaya Bereza, Kartuz Bereze,

Kartuz Bereza

http://www.yivoencyclopedia.org/article.aspx/Molodowsky_Kadia History

http://www.jewishvirtuallibrary.org/jsource/judaica/ejud_0002_0003_0_02629.html History

http://www.jewishencyclopedia.com/articles/3057-bereza History

http://data.jewishgen.org/wconnect/wc.dll?jg~jgsys~community~-1942010 JewishGen Locality Page

http://cpsa.info/bereza/Bereza_Kartuska_list_1930.html Register of Names and Occupations

Sielec  Syalyets [Bel], Selets [Rus], Sielec [Pol], Seltz [Yid], Selts, Selitz, Sialec, Sjalec, Syalets, Sielec nad Jasiołdą

http://data.jewishgen.org/wconnect/wc.dll?jg~jgsys~community~-1950455 JewishGen Locality Page

Bluden  Pyershamayskaya [Bel], Błudeń [Pol], Bluden' [Rus], Błudzień [Bel], Pervomayskaya [Rus], Pieršamajskaja, Blodno

http://data.jewishgen.org/wconnect/wc.dll?jg~jgsys~community~-1948550 JewishGen Locality Page