Bergtold, William Harry
Nationality: Undetermined, possibly 
(United States)
Identities and Authority Control
- Open Library: OL2582588A
- pdbooks.info ID: 122735
William Harry Bergtold Contributed to the Following:
| Title | Edition | Year of Publication | Role | Country of Publication | Possible Copyright Status | Available Online? | |||
|---|---|---|---|---|---|---|---|---|---|
|  |  | 
| ||||||
| A study of the incubation periods of birds | 1917 | Author | |  | |  | |    
| |