 |  |  | Cambridge Scientific Abstracts |
 |  |  | Current Contents/Agriculture, Biology & Environmental Sciences |
 |  |  | Elsevier BIOBASE |
 |  |  | Environmental Abstracts |
 |  |  | Environmental Periodicals Bibliography |
 |  |  | GEOBASE |
 |  |  | International Bibliography of the Social Sciences |
 |  |  | Journal of Economic Literature |
|  |
 |  |  | RePEc |
 |  |  | Rural Development Abstracts |
 |  |  | Rural Extension, Education & Training Abstracts |
 |  |  | Sage Urban Studies Abstracts |
 |  |  | Science Citation Index |
 |  |  | Scopus |
 |  |  | World Agricultural Economics & Rural Sociology Abstracts |
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