00757naa#a2200193#i#450# EN\\bibl\71123 20241121214203.4 1998-8990 20231020b2023####ek#y0engy0150####ca RU EXPERIMENTAL METHOD OF AMIDE NITROGEN CONCENTRATION DETERMINING IN CONSTRUCTION MATERIALS Journal article Saint-Petersburg Saint-Petersburg University of State Fire Service of Emercom of Russia 2023 11 с. Journal article local Высшее образование. Высшая школа. Подготовка научных кадров. 378 Medvedeva Lyudmila V. Makarchuk Galina V. Brantsevich Gennady V. journals.igps.ru