Campbell, Hardy Webster, 1850–1933
Nationality: Undetermined, possibly 
(United States)
Identities and Authority Control
- Open Library: OL2521556A
- pdbooks.info ID: 124672
Hardy Webster Campbell Contributed to the Following:
| Title | Edition | Year of Publication | Role | Country of Publication | Possible Copyright Status | Available Online? | |||
|---|---|---|---|---|---|---|---|---|---|
|  |  | 
| ||||||
| Campbell's 1907 soil culture manual: a complete guide to scientific agriculture as adapted to the semi-arid regions | 1907 | Author | |  | | | | 
| |
| Progressive agriculture, 1916, tillage, not weather, controls yield | 1916 | Author | | | | | |   
| |
| Soil culture primer: a plain and practical discussion of the relation of plants to the soil and the principles of growth; the laws governing the movement of water in the soil and its evaporation from the surface | 1914 | Author | | | |  | |
| |