Gretta, Clemens
Nationality: Undetermined, possibly 
(United States)
Identities and Authority Control
- pdbooks.info ID: 91951
Clemens Gretta Contributed to the Following:
| Title | Edition | Year of Publication | Role | Country of Publication | Possible Copyright Status | Available Online? | |||
|---|---|---|---|---|---|---|---|---|---|
|  |  | 
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| Castaways of the stratosphere: or, Hunting the vanished balloonists | 1935 | Illustrator | |  | |  | | ||