TY  - GEN
ED  - BUREAU OF CEYLON STANDARDS
TI  - SLS 428 : 1977 : Random sampling methods
PY  - 1977///
CY  - Colombo
PB  - BUREAU OF CEYLON STANDARDS
KW  - a658.562
KW  - SRI LANKA-STANDARDS
KW  - STANDARDS-SRI LANKA
N1  - STD2615
ER  -