Duckworth, John Herbert, 1879–
Nationality: Undetermined, possibly 
(United States)
Identities and Authority Control
- Open Library: OL2427354A
- pdbooks.info ID: 19337
John Herbert Duckworth Contributed to the Following:
| Title | Edition | Year of Publication | Role | Country of Publication | Possible Copyright Status | Available Online? | |||
|---|---|---|---|---|---|---|---|---|---|
|  |  | 
| ||||||
| Autosuggestion and its personal application | 1923 | Author | |  | |  | | 
| |