Hetzel, Frederic Valerius, 1870–
Nationality: Undetermined, possibly 
(United States)
Identities and Authority Control
- Open Library: OL2355316A
- pdbooks.info ID: 16588
Frederic Valerius Hetzel Contributed to the Following:
| Title | Edition | Year of Publication | Role | Country of Publication | Possible Copyright Status | Available Online? | |||
|---|---|---|---|---|---|---|---|---|---|
|  |  | 
| ||||||
| Belt conveyors and belt elevators | 1922 | Author | |  | | | | 
| |
| Belt conveyors and belt elevators | 1926 | Author | |  |  | | | ||