Cylchgrawn 38 Cyfresol 9 Dogfen y Llywodraeth 8 Llyfr 4

T - Technoleg 15 H - Gwyddor Gymdeithasol 11 R - Meddygaeth 7 V - Gwyddor Lyngesol 5 K - Y Gyfraith 3 N - Celfyddyd Gain 2 Q - Gwyddoniaeth 2 E - Hanes yr Unol Daleithiau 1 S - Amaethyddiaeth 1 Gweld pob un ...

Institution of Mechanical Engineers (Great Britain) 7 Naval Safety Center 6 American Society of Safety Engineers 5 American Driver and Traffic Safety Education Association 2 National Institute for Occupational Safety and Health 2 Naval Aviation Safety Center (U.S.) 2 People's Computer Company 2 Professional Management Associates, Inc 2 AIA/ACSA Council on Architectural Research 1 American Psychological Association 1 Asia Pacific Association of Threat Assessment Professionals 1 Association of European Threat Assessment Professionals 1 Association of Threat Assessment Professionals 1 Australia Fisheries Branch 1 Australia Fisheries Division 1 Bureau of National Affairs (Arlington, Va.) 1 Canadian Association of Threat Assessment Professionals 1 Congressional Quarterly, inc 1 Couig, Mary Pat 1 E.I. du Pont de Nemours & Company 1 Edward Elgar Publishing 1 IEEE Information Theory Group 1 IEEE Information Theory Society 1 Institute for Healthcare Improvement 1 Institute of Electrical and Electronics Engineers Information Theory Group 1 Institute of Electrical and Electronics Engineers Professional Technical Group on Information Theory 1 International Code Council 1 International Ergonomics Association 1 International Labour Office 1 International Labour Organization 1 Gweld pob un ...

English 51

1945- 1 1945-1953 1 1945-1989 1 Since 1945 1

United States 10 China 2 Nigeria 2 Australia 1 Chine 1 Maryland 1 New York 1 New York (N.Y.) 1 New York (State) 1 Gweld pob un ...