| Nota de fuente |
WWW DDB, 04-05-2009---(Veld, Roeland J. in't, lebensdaten: 1942; In 't Veld, R. J. ; Veld, Roeland Jaap in 't; Veld, Roel in 't; Veld, R. J. in 't)
Horizon scan report 2007, 2008---port. ([editors, Roel In 't Veld and Hans Van der Veen])
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