The data is this spreadsheet is taken from Wikidata during the course of 2020 and 2021. The original data was downloaded from the research repository of TU Delft, enriched and then uploaded to Wikidata. 

There are some inconsistencies in the data that still need to be fully explored. Not every thesis had a faculty or languages of text associated with it; there are both duplicates in the original TU Delft repository and Wikidata

The columns and descriptions are largely self-evident. The only one complication is the list of the faculties. Theses (whether from past or present) are associated with the contemporary faculties, and not with faculties that have now been dissolved or absorbed. This is a merely a reflection of how the faculties are cited in the original TU Delft research repository