(various modifications)
Engel, S., and J. Reese Voshell. 2002. Volunteer biological monitoring: Can it accurately assess the ecological condition of streams?” American Entomologist 48(3):164-177.
Fore, L.S., K. Paulsen, and K. O’Laughlin. 2001. Assessing the performance of volunteers in monitoring streams. Freshwater Biology 46:109-123.
Frost Nerbonne, J., and B. Vondracek. 2003. Volunteer macroinvertebrate monitoring: Assessing training needs through examining error and bias in untrained volunteers. Journal of the North American Benthological Society 22(1):152-163.
Gowan, C., M. Ruby, R. Knisley, and L. Grimmer. 2007. Stream monitoring methods suitable for citizen volunteers working in the Coastal Plain and Lower Piedmont regions of Virginia. American Entomologist 53(1):48-57.
Penrose, D., and S. M. Call. 1995. Volunteer monitoring of benthic macroinvertebrates: Regulatory biologists’ perspectives. Journal of the North American Benthological Society 14(1):203-209.