. . . . "Multichannel seismic-reflection profiles collected in May 1981, between latitudes 40 p0 s40 and 45 p0 s00 north, offshore of northern California and southern Oregon"@en . . . . . . . . . . . . . . "Multichannel seismic-reflection profiles collected in May 1981, between latitudes 40° 40' and 45° 00' north, offshore of northern California and southern Oregon"@en . . . . "Seismic profiling California, Northern." . . "Seismic profiling Oregon." . .