found: Opera mathematica Ioannis Schoneri ... 1551:t.p. (Ioannis Montani)
found: BM STC German 1455-1600:p. 979 (Berg, Johann vom, Nuremberg, 1541-64; "heirs of" as early as 1565)
found: Clavis typographorum librariorumque ... 1992:p. 469 (Vom Berg, Johann (1541-1563): Nürnberg)
found: RLIN, 5/17/95(hdg.: Vom Berg, Johann, d. 1563; usage: Johann vom Berg, Johan vom Berg, Ioannis Montani)
found: Grove Music Online, WWW site, June 15, 2005(Berg, Johann vom (Montanus; vom Perg, Johann; von Berg, Johann); b. ca. 1500-15, Ghent; d. Aug. 7, 1563; German printer)
found: Das neue Lexikon der Musik, 1996, online version via xipolis.net, June 15, 2005(Montanus; Johann van den Berg; Johannes vom Berg; b. Gent; d. Aug. 7, 1563, Nürnberg; flämischer Musikverleger)
notfound: De Martini Forbisseri Angli navigatione in regiones occidentis et septentrionis, 1580: t.p. (Haeredum Iohannis Montani)
found: Katalog der Deutschen Nationalbibliothek, viewed May 9, 2023(Vom Berg, Johann ; printer and music publisher active in Nuremberg (1542-1563) ; from 1543 works together with Ulrich Neuber (-1571) ; born in Ghent, died 1563 in Nuremberg) - https://d-nb.info/gnd/123255791