Pytel, Andrew. Strength of materials / Andrew Pytel and Ferdinand L. Singer. - 4th ed. - New York : Harper & Row, c1987 [1999]. - xiii, 594 pages : illustrations ; 22 cm. Includes index. ISBN: 0060453133 0063505991 Subjects--Topical Terms: Strength of materials. Subjects--Geographic Terms: Dewey Class. No.: 620.112 PYT