Hazard Ranking Method for Populations Exposed to Arsenic in Private Water Supplies: Relation to Bedrock Geology. - Crabbe H; Fletcher T; Close R; Watts MJ; Ander EL; Smedley PL; Verlander NQ; Gregory M; Middleton DRS; Polya DA; Studden M; Leonardi GS (International journal of environmental research and public health, 2017)