Haager, Karl.
Nationality: Undetermined, possibly 
(Unknown (outside United States))
Identities and Authority Control
- pdbooks.info ID: 57790
Karl. Haager Contributed to the Following:
| Title | Edition | Year of Publication | Role | Country of Publication | Possible Copyright Status | Available Online? | |||
|---|---|---|---|---|---|---|---|---|---|
 |  |  | 
| ||||||
| Allgemeines lehrbuch der bienenzucht | 1928 | Author | |  |  | | | ||