DescriptionNl-fraunhoferlijntjes.ogg Dutch pronunciation for "fraunhoferlijntjes" — male voice. Date 6 June 2015 Source Own work Author marcel coenders...
DescriptionNl-fraunhoferlijntje.ogg Dutch pronunciation for "fraunhoferlijntje" — male voice. Date 6 June 2015 Source Own work Author marcel coenders...