Statistika stachek v Rossii i v drugikh industrialʹnykh stranakh Evropy i v SShA - Kovalʹchenko, Ivan Dmitrievich; Bovykin, Valeriĭ Ivanovich; Lagrange, Hugues (Akademi︠i︡a nauk SSSR, In-t istorii SSSR, 1986)