Received for publication January 2, 1973. This research was supported in part by the Environmental Protection Agency, National Ecological Research Laboratory, Corvallis, Oregon. Mention of a trademark or name of a proprietary product does not constitute a guarantee or warranty of the product by the USDA, and does not imply its approval to the exclusion of other products that may also be suitable.
All Time | Past Year | Past 30 Days | |
---|---|---|---|
Abstract Views | 0 | 0 | 0 |
Full Text Views | 30 | 25 | 2 |
PDF Downloads | 22 | 16 | 0 |