SLS 433 :1978 : Sizes of drawing sheets.
- Colombo BUREAU OF CEYLON STANDARDS 1978
- 08p.
STD2621
SLS 433 : 1978
a744.36.676.35
SRI LANKA-STANDARDS
SRI LANKA-STANDARDS
744.36.676.35
STD2621
SLS 433 : 1978
a744.36.676.35
SRI LANKA-STANDARDS
SRI LANKA-STANDARDS
744.36.676.35