Campbell, Benjamin J. (Benjamin John), 1867–
Nationality: Undetermined, possibly 
(United States)
Identities and Authority Control
- Open Library: OL2334360A
- pdbooks.info ID: 10705
Benjamin J. (Benjamin John) Campbell Contributed to the Following:
| Title | Edition | Year of Publication | Role | Country of Publication | Possible Copyright Status | Available Online? | |||
|---|---|---|---|---|---|---|---|---|---|
|  |  | 
| ||||||
| Essentials of business English | 1915 | Author | |  | |  | |    
| |
| National business speller | 1921 | Author | | | | | | ||
| National business speller | 1937 | Author | | | | | | ||