Schilderman, P. A. E. L.; Moonen, E. J. C.; Maas, L. M.; Welle, I.; Kleinjans, J. C. S. (1999). "Use of Crayfish in Biomonitoring Studies of Environmental Pollution of the River Meuse". Ecotoxicology and Environmental Safety. 44 (3): 241–252. Bibcode:1999EcoES..44..241S. doi:10.1006/eesa.1999.1827. ISSN0147-6513. PMID10581118.
Schilderman, P. A. E. L.; Moonen, E. J. C.; Maas, L. M.; Welle, I.; Kleinjans, J. C. S. (1999). "Use of Crayfish in Biomonitoring Studies of Environmental Pollution of the River Meuse". Ecotoxicology and Environmental Safety. 44 (3): 241–252. Bibcode:1999EcoES..44..241S. doi:10.1006/eesa.1999.1827. ISSN0147-6513. PMID10581118.
"Clean Water". Missouri Conservationist Magazine. Vol. 69, no. 11. Missouri Department of Conservation. November 2008. Archived from the original on 25 October 2019. Retrieved 25 October 2019.
Schilderman, P. A. E. L.; Moonen, E. J. C.; Maas, L. M.; Welle, I.; Kleinjans, J. C. S. (1999). "Use of Crayfish in Biomonitoring Studies of Environmental Pollution of the River Meuse". Ecotoxicology and Environmental Safety. 44 (3): 241–252. Bibcode:1999EcoES..44..241S. doi:10.1006/eesa.1999.1827. ISSN0147-6513. PMID10581118.
"Clean Water". Missouri Conservationist Magazine. Vol. 69, no. 11. Missouri Department of Conservation. November 2008. Archived from the original on 25 October 2019. Retrieved 25 October 2019.
Schilderman, P. A. E. L.; Moonen, E. J. C.; Maas, L. M.; Welle, I.; Kleinjans, J. C. S. (1999). "Use of Crayfish in Biomonitoring Studies of Environmental Pollution of the River Meuse". Ecotoxicology and Environmental Safety. 44 (3): 241–252. Bibcode:1999EcoES..44..241S. doi:10.1006/eesa.1999.1827. ISSN0147-6513. PMID10581118.
youtube.com
"YouTube". YouTube. 12 April 2018. Archived from the original on 30 October 2021. Retrieved 27 July 2018.