Hopfen, Otto Helmut, 1870–
Nationality: Undetermined, possibly 
(Poland)
Identities and Authority Control
- pdbooks.info ID: 128858
Otto Helmut Hopfen Contributed to the Following:
| Title | Edition | Year of Publication | Role | Country of Publication | Possible Copyright Status | Available Online? | |||
|---|---|---|---|---|---|---|---|---|---|
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| Verdorben zu Berlin: roman | 1914 | Author | |  |  | | | ||