How to read the marksstated by Wikidata or indexed by OpenAlex
Advisors on Wikidata1
From Wikidata, shown separately from the thesis records.
- stated by Wikidata
The line above and below2 steps
The advisors of their advisors, four steps up at most, in the thesis records and on Wikidata, each kind marked; a person in both is listed once.
- 1 step up
stated by WikidataChristiaan Snouck
- 2 steps up
stated by WikidataMichael Jan de Goeje
Education and career4
From Wikidata, shown separately from the thesis records. Each place opens its Wikidata item.
- from 1921worked
- 1939 to 1951worked
- undatedstudied
- undatedworked
