Deryugin N. Memorandum from the senior water engineer. In Russian /Deryugin N. Pamyatka starshego mashinista vodosnabzheniya. Deryugin N. Memorandum from the senior water engineer. 1934. We have thousands of titles and often several copies of each title may be available. Please feel free to contact us for a detailed description of the copies available. SKUalbbcf32992b0c6fa97.