| Views | |
|---|---|
| Problems ... | 76 |
| April 2026 | May 2026 | June 2026 | July 2026 | August 2026 | September 2026 | October 2026 | |
|---|---|---|---|---|---|---|---|
| Problems ... | 12 | 3 | 5 | 11 | 12 | 8 | 14 |
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| Problems of ecology.pdf | 48 |
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| United States | 20 |
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| Athens | 1 |