"Vredestein" rubber works, engineering bureau late e. L. C. Schiff ltd., Loosduinen.
<span lang="en">Anonymous</span><span style="display:none">Unknown author</span>,
<a rel="nofollow" class="external text" href="https://resolver.kb.nl/resolve?urn=MMKB02A:000030672:00034">International rubber congres and exhibition at Batavia</a>