Search Results : EPA National Library Catalog

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Select Item Title Year Published
  1 Method 445. in vitro determination of chlorophyll a and pheophytin a in marine and freshwater algae by fluorescence / {electronic resource} : 1997
  2 Environmental monitoring and assessment program (EMAP) : chemical method evaluation guidance / 1996
  3 Environmental Monitoring and Assessment Program methods format guidance / 1995
  4 Environmental monitoring and assessment program overview : methods format guidance. 1995
  5 Manual of Design for Slow Sand Filtration 1991
  6 Selected Bibliography on the Periphyton, 1982. 1982
  7 Elementary Mathematical Problem Arising in Diatom Taxonomy. 1981
  8 Cancer Mortality and Public Drinking Water in St. Louis City and County. 1980
  9 Phycoperiphyton (Algae) as Indicators of Water Quality. 1978
  10 Studies on Ohio diatoms 1977
  11 Implications of diatom succession in postglacial sediments from two sites in northern Iowa 1968

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