Gruber, Calvin Luther, 1864–
Nationality: Undetermined, possibly 
(Unknown)
Identities and Authority Control
- Open Library: OL2390357A
- pdbooks.info ID: 140822
Calvin Luther Gruber Contributed to the Following:
| Title | Edition | Year of Publication | Role | Country of Publication | Possible Copyright Status | Available Online? | |||
|---|---|---|---|---|---|---|---|---|---|
 |  |  | 
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| The government of the state of Pennsylvania, including local government | 1912 | Author | |  |  | | |    
| |