Exercise 2

A physical copy of the book is available in the following library in Zürich:

ETH-Bibliothek HDB, Hönggerbergring 37, 8093 Zürich

More over there exists a copy at the following library in canton Schwyz:

Stiftung Bibliothek Werner Oechslin, Luegetenstrasse 11, 8840 Einsiedeln

With this links, you can have the online versions of the book:

https://books.google.ch/books?id=MZQNAAAAQAAJ&printsec=frontcover&hl=de&source=gbs_ge_summary_r&cad=0#v=onepage&q&f=false

https://www.e-rara.ch/zut/content/zoom/1950987