COLLECTED BY
Organization: ETH Zürich, ETH-Bibliothek, Hochschularchiv der ETH Zürich
Archive-It Partner 2240: ETH Zürich, ETH-Bibliothek, Hochschularchiv der ETH Zürich
Collection: ETH Zürich Collection
Archive-It Partner 2240: ETH Zürich, ETH-Bibliothek, Hochschularchiv der ETH Zürich - Collection 18167: ETH Zürich Collection
TIMESTAMPS
The Wayback Machine - https://web.archive.org/web/20180726233830/https://www.christiaanse.arch.ethz.ch/upload/WS6.pdf