This difficult cover publication is from the Sixth Republic Mining and Metallurgical Congress, Canada, 1957. The binding is in great problem with some color and folding loss at the top and quite bottom of the spinal column. Inside, the paper has actually darkened a little with age, however all the web pages are clean and there are no rips or bends. On the whole, an excellent high quality copy of this quantity. Asking $25. We will mail it within Canada with the additional expense of shipping (request for a delivery quote if you're interested).