Douglas A. Body-wave magnitudes and locations of explosions at the Chinese test site,1967-1989 / A. Douglas, P. D. Marshall, K. H. Jones, 1993. - 8 p.,11 l. p.,11 l. - Текст : непосредственный.
Douglas A. Body-wave magnitudes and locations of french explosions in the South Pacific / A.Douglas,P.D.Marshall,J.B.Young, 1993. - 9 p.,12 l. 9 p.,12 l. - Текст : непосредственный.
High-frequency seismic signals recorded at Eskdalemuir,Scotland / F.H.Grover,P.D.Marshall,A.Douglas,T.Milbourne, 1993. - 34 p. - Текст : непосредственный.