<https://rsnijders.info/vakblog/#/schema/person/e4dd30d26297417cde03e3bff50e72a8>
<http://schema.org/image>
<https://rsnijders.info/vakblog/#personlogo>
<https://rsnijders.info/vakblog/2012/05/30/eenvoudig-ebooks-maken-met-pressbooks/>