Sources on Jewish Communities in this section: 

Gatz Szokoljanonka  Gać [Pol], Gatch [Yid], Gach, Gatsch, Gać Sokola, Gać Sokola Łąka, Sokola Ląka

http://data.jewishgen.org/wconnect/wc.dll?jg~jgsys~community~-501045 JewishGen Locality Page

Lomsha  Łomża [Pol], Lomzhe [Yid], Lomzha [Rus]

http://data.jewishgen.org/wconnect/wc.dll?jg~jgsys~community~-513991 JewishGen Locality Page

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

http://www.yivoencyclopedia.org/article.aspx/%C5%81omza History

http://www.jewishencyclopedia.com/articles/10097-lomza-lomzha History

Nowogrod  Nowogród [Pol], Novogrod [Rus, Yid], Novegrod, Novogrud

http://data.jewishgen.org/wconnect/wc.dll?jg~jgsys~community~-518975 JewishGen Locality Page

http://kehilalinks.jewishgen.org/Nowogrod/ KehilaLink

Pjontnitza  Piątnica [Pol], Piontnitza [Yid], Pyentnitza [Rus], Piątnica Poduchowna

http://data.jewishgen.org/wconnect/wc.dll?jg~jgsys~community~-521603 JewishGen Locality Page

Sznjadowo  Śniadowo [Pol], Shnodovo [Yid], Sniadovo [Rus], Shniadove

http://data.jewishgen.org/wconnect/wc.dll?jg~jgsys~community~-529099 JewishGen Locality Page