Description
Related Subjects
The graph displays the other subjects mentioned on the same pages as the subject "William [M.?] [Devries?]". If the same subject occurs on a page with "William [M.?] [Devries?]" more than once, it appears closer to "William [M.?] [Devries?]" on the graph, and is colored in a darker shade. The closer a subject is to the center, the more "related" the subjects are.