00654naa#a2200217#i#450# EN\\bibl\80641 20241104235027.1 2076-0655 20140325b2014####ek#y0engy0150####ca RUS RU Features of mass-operational characteristic of magnetic control of ferroimpurities in feldspar Journal article Moscow Individual Entrepreneur Svetlana Vasilievna Samchenko 2014 6 с. Journal article local Sandulyak A A Sandulyak A V Ershova V A Snedkov A B Sandulyak D A tsilicates.ru