TY - JOUR T1 - Nation in Brief JF - The Nation's Health JO - Nations Health SP - 8 LP - 8 VL - 42 IS - 7 AU - Donya Currie Y1 - 2012/09/01 UR - http://www.thenationshealth.org/content/42/7/8.abstract N2 - The Occupational Safety and Health Administration and National Institute for Occupational Safety and Health issued a hazard alert in June to ensure workers in hydraulic fracturing operations have protections from silica exposure. ER -