00311nam a2200121Ia 450000500170000000800410001704100080005808200160006610000180008224500420010026000380014230000090018020260720174842.0260720s2011    xx            000 0 und d  aeng  a020.25 CHAL  aS.K Chaudhary  aLibrary preservation and conservation  aNew DelhibA.P.H.Publishingc2011  a276p