What is Mathematical Logic? Opus By Crossley, John N Books / Paperback Books ISBN: 0198880871 / Publisher: Oxford University Press 1972., January 1972 Price Starting at $5.59 Free Shipping Send to a friend Add to Wishlist Below is a list of products arranged by condition. Select the quantity of the product you desire and click the "Add" button. Used - Good Good condition. Writing inside. $5.59 1 in Stock at Warehouse Quantity Add Free Shipping to continental U.S. OR $1.00 per item discount if shipped to store. Reviews Goodreads reviews for What is Mathematical Logic? Opus