Natan Solomonovich Belenʹkiĭ

• Khozi͡a︡ĭstvennye vychislenii͡a︡ i ėlementy mekhanizirovannogo ucheta
• Sbornik zadach i uprazhneniĭ po khozi͡a︡ĭstvennym vychislenii͡a︡m