Pottage, John, 1924- Geometrical investigations : illustrating the art of discovery in the mathematical field / John Pottage ; foreword by Stillman Drake. - Reading, Mass. : Addison-Wesley, 1983 - 480 p. : ill. ; 25 cm. Includes bibliographical references and index LCCN: 82-11357 Subjects--Topical Terms: Mathematics--PhilosophyMathematics--History