Russian regular infantry 1801 1918
И. Ульянов “Регулярная пехота 1801-1855”
О. Леонов, И. Ульянов “Регулярная пехота 1855-1918”
RAR archives of PDF files (18 Mb and 16 Mb)
Two volumes (2nd and 3rd) of the best survey (so far) of organisation, weapons, uniforms and tactics of the regular infantry of the Russian Imperial Army.