Sources on Jewish Communities in this section:

Korzec  Korets [Rus, Ukr], Korzec [Pol], Koretz [Yid], Koritz, Korec, Koric, Korzets, Korzhets, Korzysc

http://data.jewishgen.org/wconnect/wc.dll?jg~jgsys~community~-1042840 JewishGen Locality Page

http://www.jewishgen.org/Yizkor/Korets/Korets.html Yizkor Book

http://www.jewishvirtuallibrary.org/jsource/judaica/ejud_0002_0012_0_11470.html History

Miendzyrzecz  Velyki Mezhyrichi [Ukr], Mezerich Gadol [Heb], Międzyrzecz [Pol], Mezeritch [Yid], Mezhirichi [Rus],

Meseritz, Mezerich Korets, Mezyrycz Korecki, Międzyrzec Korzecki, Międzyrzecz Korecki, Międzyrzec Wolyn, Mezeritz

Gadol, Mezhirech, Mezirici

http://data.jewishgen.org/wconnect/wc.dll?jg~jgsys~community~-1046531 JewishGen Locality Page

http://www.jewishgen.org/Yizkor/Mezhirichi/Mezirich.html Yizkor Book

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

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

http://www.yivoencyclopedia.org/search.aspx?query=Korets History