Hansen, Oscar Otto, 1856–
Nationality: Undetermined, possibly 
(Unknown (outside United States))
Identities and Authority Control
- pdbooks.info ID: 123682
Oscar Otto Hansen Contributed to the Following:
| Title | Edition | Year of Publication | Role | Country of Publication | Possible Copyright Status | Available Online? | |||
|---|---|---|---|---|---|---|---|---|---|
 |  |  | 
| ||||||
| Pædagogik | 1916 | Author | |  |  | | | ||