search query: @freeterm Eco-efficiency / total: 3
references: 2-3 / 3
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title | year | author | ||
2. |
Tourism Management
2007 : VOL. 28:2, p.377-390 |
2007 | Kelly, J. (et al.) |
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3. |
Ecological Economics
2001 : SEP, VOL. 38:3, p. 311-315 |
2001 | Hukkinen, J. |
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