Sulphitation of lac
Bhattacharya, R.
Sulphitation of lac - London 1936 - 1-20 p. - Sulphitation, Lac London Shellac Research Bureau. Technical Paper No. 6 .
Sulphitation of lac - London 1936 - 1-20 p. - Sulphitation, Lac London Shellac Research Bureau. Technical Paper No. 6 .