Petroski, Henry Invention by design how engineers get from thought to thing - Cambridge Harward press 1996 - 242 p ISBN: 9780674463684 Subjects--Topical Terms: Mechanical Engineering LC Class. No.: 620.00422 PET 1996 Dewey Class. No.: 620.00422 PET 1996 National Library of Medicine Call No.: 620.00422 PET 1996