found: Novissima et accuratissima totius Americæ, 1671cartouche (per Gerardvm A Schagen)
found: OCLC, February 22, 2012(hdgs.: Van Schagen, Gerrit Lucaszoon, 1642-1690, van Schagen, Gerret, Schagen, G. a., Schagen, Gerard A., Schagen, Gerardum A., Schagen, Gerardus a, Schagen, Gerardus a, 1677-1690 fl. ; usage, Gerrit Lucaszoon Van Schagen, Gerardo a Schagen, Gerret van Schagen, G. a Schagen, Gerardum A Schagen, Gerardvm A Schagen, Gerardum a Schagen, Gerardum à Schagen, Gerrit van Schagen, Gerrit v. Schagen)
found: LC database, February 22, 2012hdg.: (Schagen, Gerret van, b. 1642?)
found: Wikipedia, February 22, 2012(Gerard van Schagen, Gerard Lucasz or Gerrit van Schagen or van Schaagen; Latin: Gerardus a Schagen (ca. 1642 - after 1690) was a cartographer from Amsterdam, known for his maps)
found: VIAF, February 22, 2012(hdgs. : Schagen, Gerrit van 1642-1690, (alt. form Schagen, Gerardum a, 1642-1690 ; Schagen, Gerret)
found: Tooley's dictionary of mapmakers, 2004:(Schagen [à Schagen], Gerrit [Gerardus a] Lucaszoon van (c. 1642-c.1690), engraver, publisher and art dealer at the 'Haarlemmerdijk' in Amsterdam)
