Sumner, Helen L. (Helen Laura), 1876–1933
Nationality: Undetermined, possibly 
(United States)
Identities and Authority Control
- pdbooks.info ID: 118862
Helen L. (Helen Laura) Sumner Contributed to the Following:
| Title | Edition | Year of Publication | Role | Country of Publication | Possible Copyright Status | Available Online? | |||
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| History of labour in the United States | 1918 | Author | |  | |  | |    
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