TY  - BOOK
AU  - Yash Pal Kathpalia
TI  - Conservation and restoration of archive materials
SN  - 9231010735
U1  - 025.171 K29c 
PY  - 1973///
CY  - Paris
PB  - Unesco
N2  - Constituent materials of documents.
Deterioration- causes and control
ER  -