Riddle, Ethel Marie, 1885–
Nationality: Undetermined, possibly 
(United States)
Identities and Authority Control
- pdbooks.info ID: 33988
Ethel Marie Riddle Contributed to the Following:
| Title | Edition | Year of Publication | Role | Country of Publication | Possible Copyright Status | Available Online? | |||
|---|---|---|---|---|---|---|---|---|---|
|  |  | 
| ||||||
| Aggressive behavior in a small social group | 1925 | Author | |  | |  | | ||