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Publication Extents

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The karst landforms of Puerto Rico
Watson H. Monroe
1976, Professional Paper 899
Puerto Rico has a great variety of landforms developed by solution of limestone under tropical climatic conditions. Karst topography is present in most parts of Puerto Rico where limestone crops out, but it is more highly developed in the northern and northwestern parts, which are underlain by thick limestone formations of Oligocene and Miocene age....
Empirical transfer functions for stations in the Central California seismological network
W. H. Bakun, Jay Dratler
1976, Open-File Report 76-259
A sequence of calibration signals composed of a station identification code, a transient from the release of the seismometer mass at rest from a known displacement from the equilibrium position, and a transient from a known step in voltage to the amplifier input are generated by the automatic daily calibration...