Petrographic analysis of bituminous coal and anthracite. Method of determining microscopically the reflectance of vitrinite.
NORMA vydána dne 31.8.1981
Designation standards: BS 6127-5:1981
Note: NEPLATNÁ
Publication date standards: 31.8.1981
The number of pages: 16
Approximate weight : 48 g (0.11 lbs)
Country: British technical standard
Kategorie: Technické normy BS