Methods for analysis of glass.  glasses of the soda-lime-magnesia-silica type /  Part 1 : 
 Glasses of the soda-lime-magnesia-silica type 
British Standards Institution 
 - 12 leaves :   illustrations ;  30 cm. 
 - British standard ;  BS 2649 : Part 1 : 1988 .
 - British standard ;  BS 2649 : Part 1 : 1988 .