1. USEPA Information Collection Rule Microbial Laboratory Manual Ofce. Res. & Devel. Washington 1996
2. Commercial Labs: How Accurate Are They?;Clancy;Jour. AWWA,1994
3. USEPA Development of Performance Evaluation Sample Preparation Protocols for Giardia Cysts and Cryptosporidium Oocysts Final Rpt. Washington 1996
4. USEPA Evaluation of the Proposed ICR Protocol for Determining the Field Recovery of Protozoan Cysts From Source and Treated Drinking Water Washington 1996