Treatments of struggle for the fortified positions and principles of field fortification on the Western Front

Ermolaev, Mikhail Nikolaevich (1865-).Treatments of struggle for the fortified positions and principles of field fortification on the Western Front: a report of the military.Ing.regiment.Ermolaeva, commander.on zap.Front in 1915 - [Petrograd: Ex.Gen.-ApartmentSeister at the top.Commander-in-Chief, 1916].-40 p., 13 liters.Il., cards., 2 separatel.kart.: heck.;27. -Secret..Electronic Source: PB