1. Frost , W. H. H. W. Streeter Bacteriological Studies USPHS Public Health Bulletin 143 184 335 1924
2. Geldreich , Edwin E. Fecal Coliform Concepts in Stream Pollution 1967
3. Geldreich , Edwin E. Personal communication
4. Fecal Coliform Organism Medium for the Membrane Filter Technique;Geldreich;Jour. AWWA,1965