1. Toxicological profile for selenium (update). U.S. Department of Health and Human Services;ASTDR,2003
2. Standard practice for sampling phytoplankton with conical tow nets;ASTM,2003
3. Standard classification for sampling phytoplankton in surface water;ASTM,2003
4. Standard practice for sampling zooplankton with conical tow nets;ASTM,2003
5. Standard practice for collecting benthic macroinvertebrates with Eckman grab sampler;ASTM,2003