title: Investigations on viral pollution in the Romanian section of the Danube river during 1972-1977 period.
mesh_terms: D004770:Enterovirus / Q000302:isolation & purification*; D029822:Enterovirus B, Human / Q000302:isolation & purification; D017955:Poliovirus / Q000302:isolation & purification; D012383:Romania; D014871:Water Microbiology