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/20181231092626/https://www.files.ethz.ch/isn/46645/GS20.pdf