00253nam a2200121Ia 4500020001800000082000800018100003100026245001400057250000600071260004000077300000800117650000600125  a9788121905992  a531  aMathur, D.S. & Hemne, P.S. 0aMechanics  a1  aNew DelhibSChand and Companyc2019  a834  a-