Limit by calendar year: 2011 All
| Ump_Riv_Bas.pdf | 188 |
| May 2011 | June 2011 | July 2011 | August 2011 | September 2011 | October 2011 | November 2011 | December 2011 | January 2012 | February 2012 | March 2012 | April 2012 | May 2012 | |
| Ump_Riv_Bas.pdf | 1 | 4 | 2 | 0 | 1 | 0 | 2 | 2 | 3 | 5 | 28 | 32 | 23 |
| The Umpqua River study : a joint report | 278 |
| United States of America | 205 |
| Korea | 21 |
| China | 20 |
| Japan | 6 |
| Switzerland | 4 |
| Sweden | 3 |
| Hong Kong | 2 |
| Romania | 2 |
| Canada | 1 |
| Russian Federation | 1 |
| Corvallis | 70 |
| Portland | 22 |
| Seoul | 21 |
| Seattle | 20 |
| Washington | 19 |
| Roseburg | 8 |
| Beijing | 7 |
| Shenzhen | 7 |
| Salem | 5 |
| Cave Junction | 4 |