Clough, Ray W., Dynamics of structures / Ray W. Clough, Joseph Penzien. - 3rd ed. - New York : McGraw-Hill, [1975] - xxii, 634 p. : ill. ; 24 cm. Includes index. Dept of civil. ISBN: 0070113920 : $19.50 Subjects--Topical Terms: Structural dynamics. Dewey Class. No.: 624.171 / CLD