Jaap Jacobs, The Colony of New Netherland: A Dutch Settlement in Seventeenth-Century America (2nd ed. 2009) onlineArchived 2017-05-25 at the वेबैक मशीन
racm.nl
According to "Het Archeologisch Basisregister" (ABR), version 1.0 November 1992, [1], Elp Kümmerkeramik is dated BRONSMA (early MBA) to BRONSL (LBA) and this has been standardized by "De Rijksdienst voor Archeologie, Cultuurlandschap en Monumenten" (RACM) as being at the period starting at 1800 BC and ending at 800 BC.
Jaap Jacobs, The Colony of New Netherland: A Dutch Settlement in Seventeenth-Century America (2nd ed. 2009) onlineArchived 2017-05-25 at the वेबैक मशीन