00294nam a2200109 a 450000500170000008200160001710000300003324500250006326000490008830000230013770000240016020251203091528.0  a025.8,bmuk  aMukhopadhyay, Kalyankumar  aLibrary conservation  aCalcutta: Information research Academyc1990  axvi, 328p.c23 cm.  aGuha, Partha, Subir