The Encyclopedia of How It Works from Abacus to Zoom Lens by Donald Clarke A W Publishers, Inc., 1977, Hardcover, Dust Jacket This book and dust jacket are in very good condition with some shelf wear. Price is clipped on the dust jacket. We will be happy to combine shipping, wherever possible. Some items cannot be combined because of their size, weight or because they are fragile. Please ask if you have any questions. Your order will ship by the next business day after receiving payment. All items are from a smoke-free environment. Thank you, and Happy Reading!