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- ProQuest (Firm)40
- Making of America Project35
- BioOne (Organization), distributor20
- Credo Reference (Firm), distributor17
- Project Muse11
- Edward Elgar Publishing, publisher8
- Project Muse, distributor6
- ebrary, Inc6
- Hunter, Danny5
- International Institute for Environment and Development5
- Colfer, Carol J. Pierce4
- Hester, R. E. (Ronald E.)4
- Ligaran4
- Sparks, Donald L., 1953-4
- American Phytopathological Society, author3
- CSIRO (Australia)3
- Child, B. (Brian)3
- Clawson, Marion, 1905-19983
- Credo Reference (Firm)3
- Palgrave Connect (Online service)3