In Russian. Erman, Moisey Isaakovich. Hygienic evaluation of basic apparatus of chemical technology. Moscow: Medicine, 1971. Gigienicheskaya otsenka osnovnykh apparatov khimicheskoy tekhnologii. In Russian /Hygiene assessment of basic chemical engineering apparatus . All images are for identification of editions only. Several books of the same edition may be available. Please feel free to request photos of available books. SKU7050037