Hardcover binding is firm and hinges are not cracked or damaged. Pages are tight and clean. Boards and DJ have light shelfwear and rubbing. Library discard with usual marks and attachments. Pocket and ffep removed. DJ protected with mylar. Year: 1973 Binding: Hardcover, 296 pages, ISBN: 0398028281This book presents the views of twenty-six contributors, representing a variety of professional disciplines from the physical, biological, and social sciences, and the humanities.