00345nam a2200133Ia 4500008004100000041001200041082001700053100003200070245003100102250001100133260004600144300001200190650000900202231217s9999    xx            000 0 und d  aEnglish  a658.542  ILO  aInternational Labour Office 0aIntroduction to work study  a3rd ed  c1979bInternational Labour OfficeaGeneva  axiv+442  awork