Russian standards PDF
Non-diluted sperm of bulls. Methods of microbiological tests
Document status: Active
Selenium for industrial use. Atom-absorption method for determination of copper, iron, tellurium and plumbum
Document status: Active
Selenium technical. Methods of sulphur determination
Document status: Active
Selenium technical. Methods of aluminum determination
Document status: Active
System of design documents for construction. Elements of sanitary engineering systems-symbols
Document status: Replaced by GOST 21.205-2016