The links below are commonly used in OSHT study.
American Board of Industrial Hygiene -- Website of the American Board of Industrial Hygiene (ABIH), a not-for-profit corporation formed to improve the practice and educational standards of the profession of industrial hygiene and to certify practicing industrial hygienists
American College of Occupational and Environmental Medicine -- Website of the American College of Occupational and Environmental Medicine (ACOEM), comprised of physicians and health care workers who promote worker health through preventive medicine, clinical care, research, and education.
American Industrial Hygiene Association -- Website of the American Industrial Hygiene Association (AIHA), a non-profit organization of industrial hygienists and other occupational health, safety and environmental professionals.
The American Society of Safety Engineers -- Website of the American Society of Safety Engineers (ASSE), professional safety organization that provides professional development and representation for safety, health and environmental practitioners.
National Safety Council -- Website of the National Safety Council, including resources on safety, health, environmental policies, practices and procedures.