References
- Ritschel‐Beurlin , G. 1976 . Total and Coliform Microbial Count in an Andean River and Its Relationship to Population Density . J. Environ. Sci. Health All , : 313 – 319 .
- 1975 . “Samplers for Monitoring Microorganisms in Liquids” , 407 Bedford, PB : Millipore Corp. .
- August 1962 . Water Quality Standards Citeria Digest, A Compilation of Federal/State Criteria on Bacteria , August , Washington, D.C. : Environmental Protection Agency .
- April 1 1968 . National Technical Advisory Committee Report to the U.S. Secretary of the Interior April 1 , 20 Water Quality Criteria.
- 1944 . Ohio River Pollution Survey , 230 Washington, D.C. : U.S. Public Health Service, U.S. Government Printing Office . Part II, Fig. OH‐19, facing
- 1959 . “ Water Quality and Plow Variations, Ohio River and Tributaries ‐ 1956–1957 ” . In Monitor‐stations records and other information assembled from the basic data files of the Ohio River Valley Sanitation Commission Cincinnati, OH