G.D. Bakulev Experience of the Statistical Survey of the Work of Difficult Parts at the Izhevazov Plants for the Period August 1920 to February 1921 In Russian (ask us if in doubt)./Bakulev G.D. Opyt statisticheskogo obsledovaniya raboty trudchastey na Izhevzavodakh za period Avgust 1920 g. Fevral' 1921 g. With a foreword by S. I. Semkov. Izhevsk. 1921. 67 p., 7 stickers., 17,322.3 cm. SKUalbc8f2b91a058f8906.