Additional improvement patents, 1837-1861 /
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| Corporate Author: | |
|---|---|
| Other Authors: | |
| Format: | Government Document Book |
| Language: | English |
| Published: |
Washington :
National Archives and Records Service, General Services Administration,
1977.
|
| Series: | Special list (National Archives (U.S.)) ;
no. 39. |
| Subjects: |