00248nam a2200097Ia 450000500170000000800410001710000160005824500340007426000340010830000080014220260413101156.0230516s9999||||xx |||||||||||||| ||und||  aDhawan R.K. 2aA  Text Book Of Engg. Drawing  bDelhi S.K. Katria& Sonsc1996  a400