TY  - GEN
ED  - SRI LANKA STANDARDS INSTITUTION
TI  - SLS : 114 : 1987 : Specification for school chalks (First revision)
PY  - 1987///
CY  - Colombo
PB  - SLSI
KW  - a667.56
KW  - SRI LANKA-STANDARDS
KW  - STANDARDS-SRI LANKA
N1  - STD2289
ER  -