Proceedings of the I.U.T.A.M. Symposium on Optical Methods in Mechanics of Solids: held at the University of Poitiers, France, Sept. 10-14, 1979 / editor, Alexis Lagarde. - Alphen aan den Rijn: Sijthoff & Noordhoff, 1981. - xii, 700 p.: ill.; 25 cm. Includes bibliographies. ISBN: 9028608605 Subjects--Topical Terms: Materials--Testing--Congresses.Optical measurements--Congresses.