Editore: Harper & Brothers, NY, 1943
Da: Reflection Publications, Madison, NH, U.S.A.
hardcover. Condizione: Very Good. Blue cloth hardcover, no dust jacket, 134 pages, very good condition. "Written as part of a program of the Rochester Athenaeum and Mechanics Institute for developing teaching materials of a practical nature which are closely related to the actual requirements of various jobs in industry.".