Elfreth, William Henry
Nationality: Undetermined, possibly 
(United States)
Identities and Authority Control
- Open Library: OL2397288A
- pdbooks.info ID: 138729
William Henry Elfreth Contributed to the Following:
| Title | Edition | Year of Publication | Role | Country of Publication | Possible Copyright Status | Available Online? | |||
|---|---|---|---|---|---|---|---|---|---|
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| Patents, copyrights, and trade-marks | 1913 | Author | |  | |  | | 
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