1. American Public Health Association (APHA), American Waterworks Association, and Water Pollution Control Federation (1971) Standard methods for the examination of water and wastewater. American Public Health Association, Washington, D.C.
2. Annual Book of ASTM Standards (ASTM) (2002) ASTM Guide E 729–88a, Standard Guide for Conducting Acute Toxicity Tests with Fishes, Macroinvertebrates, and Amphibians. American Society for Testing and Materials, West Conshohocken
3. Brumbaugh WG, May TW, Besser JM, Allert AL, Schmitt CJ (2007) Assessment of elemental concentrations in streams of the New Lead Belt in southeastern Missouri, 2002–05: US Geological Survey Scientific Investigations Report 2007–5057, p 57
4. Clarkson RW, Rorabaugh JC (1989) Status of leopard frogs (Rana pipiens complex: Ranidae) in Arizona and Southeastern California. Southwest Nat 34:531–538
5. EPA (2003) Acute-to-Chronic Estimation (ACE v 2.0) with Time-Concentration-Effect Models User Manual. EPA/600/R-03/107 December 2003