00323nam a2200109 a 450000500170000002000150001708200130003210000260004524500770007126000460014830000190019420251203110133.0  a8176290866  a331bJIN  aSingh, Jiwitesh Kumar  aLabour economicsbprinciples problems and practices of trade unionism...  aNew DelhibDeep & Deep Publicationsc1998  axx,570p.c22cm