00589naa#a2200193#i#450# EN\\bibl\66874 20241124213633.7 1998-8990 20170925b2017####ek#y0engy0150####ca RUS RU MEASURING THE DEGREE BLACK SURFACE BY COMPARISON RADIATIVE FLUX Journal article Saint-Petersburg Saint-Petersburg University of State Fire Service of Emercom of Russia 2017 6 с. Journal article local Nekrasov A S Kuzmin A A Romanov N N journals.igps.ru