1. Standard practice for sampling phytoplankton with conical tow nets. D4132–82;ASTM,2003
2. Standard classification for sampling phytoplankton in surface water. D4149–82;ASTM,2003
3. Standard practice for sampling zooplankton with conical tow nets. D1201–87;ASTM,2003
4. Standard practice for collecting benthic macroinvertebrates with Eckman grab sampler. D4343–82;ASTM;Annual Book of ASTM Standards,2003
5. Selenium;Barceloux;Clin. Toxicol.,1999