TY  - BOOK
AU  - Duggal, S.k
TI  - Building materials 
SN  - 0117009113 (pbk.) :
U1  - 624 
PY  - 2019///
CY  - London
PB  - New age international ltd.
N1  - 0; 0; 0; 624_000000000000000_DUG
ER  -