SLS 428 : 1977 : Random sampling methods
- Colombo BUREAU OF CEYLON STANDARDS 1977
- 52p.
STD2615
SLS 428 : 1977
a658.562
SRI LANKA-STANDARDS
STANDARDS-SRI LANKA
658.562
STD2615
SLS 428 : 1977
a658.562
SRI LANKA-STANDARDS
STANDARDS-SRI LANKA
658.562