| web | http://www.nrs.fs.fed.us/pubs/rb/rb_nrs009.pdf |
| doc-title | Assessing Urban Forest Effects and Values |
| author | David J. Nowak (research forester), Robert E. Hoehn III (biological sciences technician) |
| publication | USDA Forest Service |
| date | 2007-02-01 |
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