title: A simple method for the detection of low concentration of viruses in large volumes of water by the membrane filter technique.
mesh_terms: D000327:Adsorption; D002118:Calcium / Q000494:pharmacology; D005374:Filtration; D008722:Methods; D017955:Poliovirus / Q000302:isolation & purification*; D014780:Viruses / Q000302:isolation & purification*; D014871:Water Microbiology
chemical_list: D002118:Calcium