| environmental factors correlated with size of bacterial populations in a polluted stream. | samples of water were taken from a polluted zone of the gallinas river and analyzed as to numbers of total bacteria, coliforms, and fecal streptococci. environmental factors measured were temperature, ph and concentrations of detergent, nitrate plus nitrite nitrogen, sulfate, chloride, bicarbonate, and phosphate. thirty-two observations were made from 12 march through 22 july 1971. stepwise multiple linear regression analyses of the data were carried out by computer to determine which of the env ... | 1972 | 4627965 |