Lewis, Lorna <br/><br/>Leonardo :  the inventor and pioneer / Lorna Lewis  -- London :  Heinemann,  c1963. <br/>vii, 133 p. ;  19 cm. <br/><br/><label>Subjects--Topical Terms: </label><br/>Leonardo da Vinci, 1452-1519. <br/>Inventors--Biography. <br/><br/><label>Dewey Class. No.: </label>GC 927 L673 1963