Duffield, David Walter, 1882–
Nationality: Undetermined, possibly 
(United States)
Identities and Authority Control
- pdbooks.info ID: 30572
David Walter Duffield Contributed to the Following:
| Title | Edition | Year of Publication | Role | Country of Publication | Possible Copyright Status | Available Online? | |||
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| Progressive indexing and filing for schools | 1925 | Author | |  | |  | | ||