Helderman, Leonard Clinton
Nationality: Undetermined, possibly 
(United States)
Identities and Authority Control
- Open Library: OL1652163A
- pdbooks.info ID: 72021
Leonard Clinton Helderman Contributed to the Following:
| Title | Edition | Year of Publication | Role | Country of Publication | Possible Copyright Status | Available Online? | |||
|---|---|---|---|---|---|---|---|---|---|
|  |  | 
| ||||||
| George Washington | 1932 | Author | |  | |  | | ||