The Earthquake Engineering Online Archive  NISEE e-Library

Identifier: Text-200611151
Title: Rayleigh-wave dispersion technique for rapid subsurface exploration
Creator(s): Chang, Frank K.; Ballard, Robert F.

Identifier: Text-S25928
Title: Rayleigh-wave dispersion technique for rapid subsurface exploration
Creator(s): Chang, Frank K.; Ballard, Robert F.

Identifier: Text-S25958
Title: Cavity detection and delineation research : Report 5 : Electromagnetic (radar) techniques applied to cavity detection
Creator(s): Ballard, Robert F.

Identifier: Text-S26396
Title: Seismic field methods for in situ moduli
Creator(s): Ballard, Robert F.; McLean, Francis G.

Identifier: Text-S35169
Title: In situ seismic investigation, Fort Peck Dam, Montana
Creator(s): Curro, Joseph R.; Horn, John E.; Ballard, Robert F.