Wenger, C.
k.A. // Autor mehrerer Berichte für die Studiengesellschaft für die Nutzbarmachung schweizerischer Lagerstätten mineralischer Rohstoffe
| Identifier | Title | Date | Event type | Other information | |
|---|---|---|---|---|---|
| EBA 5/87 | 1980 | Creation | Standard period of protection | ||
| EBA 5/88 | 1981 | Creation | Standard period of protection | ||
| EBA 5/89 | 1983 | Creation | Standard period of protection | ||
| EBA 5/90 | 1984 | Creation | Standard period of protection | ||
| EBA 5/91 | 1987 | Creation | Standard period of protection |