TY  - BOOK
AU  - Burguess,David
TI  - Chemical science and conservation
U1  - 069.53 B955ch 1990 
PY  - 1990///
CY  - London
PB  - Macmillan Education, 
KW  - CONSERVACION DE LA PIEDRA
KW  - CONSERVACION DEL PAPEL
ER  -