Mendes,, Fernando de Melo Portugal., Laboratório Nacional de Engenharia Civil The use of modal analysis in the mechanical characterization of rock masses / Fernando de Mello Mendes, L. Aires de Barros, F. Peres Rodrigues, LNEC

The use of modal analysis in the mechanical characterization of rock masses / Fernando de Mello Mendes, L. Aires de Barros, F. Peres Rodrigues, LNEC . - Lisboa : LNEC, 1969 . - 9 p. : il. 30 cm . - (Memória; 340))
624.131.25