title: Correlation of the blackness index of high volume air samples with the polycyclic hydrocarbon concentrations in urban air.
mesh_terms: D000397:Air Pollution; D003124:Colorimetry; D003516:Cycloparaffins; D004777:Environment; D005374:Filtration; D006838:Hydrocarbons; D009864:Ontario; D011083:Polycyclic Compounds; D014505:Urban Population
chemical_list: D003516:Cycloparaffins; D006838:Hydrocarbons; D011083:Polycyclic Compounds