found: Genre terms : a thesaurus for use in rare book and special collections cataloging, via WWW, July 26 2014(Newsletters. BT Periodicals)
found: Art & architecture thesaurus online, July 26, 2014(newsletters. UF newssheets. Letters, reports, or other brief written communications that communicate news, particularly those written by societies or buisiness organizations. Historically referred to serial publications consisting of one or a few printed sheets containing news and information of interest to the general public or to a special group.)
found: Reitz, J.M. ODLIS : online dictionary of library and information science, July 26, 2014(newsletter: A serial publication consisting of no more than a few pages, devoted to news, announcements, and current information of interest primarily to a specialized group of subscribers or members of an association or organization who receive it as part of their membership.)
found: Görlach, M. An alphabetical list of English text types, in Text types and the history of English, c2004:p. 58 (newsletter: informal printed report issued to members)