Helm, John C.
Archival Resources
| Role | Title | Holding Repository | |
|---|---|---|---|
| referencedIn | Weather Bureau | National Archives at College Park |
Bibliographic and Digital Archival Resources
| Role | Title | Holding Repository |
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Filters:
| Relation | Name | |
|---|---|---|
| associatedWith | Espy, James P. | person |
| correspondedWith | Henry, Joseph, 1797-1878 | person |
| Place Name | Admin Code | Country |
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| Subject |
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| Meteorology |
| Occupation |
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| Activity |
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