Parker, Harry. Simplified design of roof trusses for architects and builders / Harry Parker. - 2nd ed. - New York : John Wiley, c 1953. - xiv, 278 p. : ills. ; 20 cm. Includes index. 319 319 Subjects--Topical Terms: Strains and stresses. Dewey Class. No.: 694.2 / P223s