Keffer, John Poist, 1903–
Nationality: Undetermined, possibly 
(United States)
Identities and Authority Control
- Open Library: OL2183792A
- pdbooks.info ID: 181748
John Poist Keffer Contributed to the Following:
| Title | Edition | Year of Publication | Role | Country of Publication | Possible Copyright Status | Available Online? | |||
|---|---|---|---|---|---|---|---|---|---|
|  |  | 
| ||||||
| The Keffers of the Conewago Valley | 1960 | Author | |  | |  |  | 
| |