Shedd, T.C. Theory of Simple Structures T.C.Shedd and J. Vawter. - 2nd ed, reprint 2007. - London: John Wiley & Sons, c1941. - ix, 504p. : ill. ; 21 cm. Includes index. ISBN: 0852267282 Dewey Class. No.: 624/ Sh34s 2007