Short description: In Russian. Ignatov, Nikolai Konstantinovich. Practical Guide to the Methodology of Sanitary and Hygienic Research. Moscow: People’s Commissariat of Health of the RSFSR, 1927. The image is provided for reference only. It may reflect condition of one of the available copies or only help in identifying the edition. Please feel free to contact us for a detailed description of the copies available. SKU9200348