<https://www.gearpatrol.com/watches/a33890865/accutron-from-the-space-age-to-the-digital-age-book/>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://www.gearpatrol.com/watches/a33890865/accutron-from-the-space-age-to-the-digital-age-book/>