The Sources of Invention by John Jewkes
1962. Revised. 428 pages. Paperback book with red cover. Pages have mild tanning and foxing throughout, moderate at end-papers, paste-downs and text-block edges. Binding remains firm. Paper cover has mild edge-wear with light rubbing and creasing. Some light marking. Some mild damp staining to front. Sunning to spine. Top edge of text block is dust marked.