ДЛ9. Демкович. Сборник задач по физике
: Older editions and teacher-focused manuals are sometimes archived in university repositories, such as the NMU Library, which hosts the 1981 "Sbornik Zadach". Tips for Finding Specific Solutions gdz na zadachnik v.p.demkovich, l.p.demkovich
: Platforms like VK (Soviet Textbooks group) often share scans and manual solutions for classic Soviet-era problem books. such as the NMU Library