Ballard

Method for Crosshole Seismic Testing

Ballard, 1976 .

Laboratory spectroscopic studies of atmospherically important radicals using fourier transform spectroscopy

W. B. Johnston, Ballard, R. Wayne, 1989 .

High-Resolution NMR Probe for Experiments at High Pressures

Ballard, Reiner, Jonas, 1996, Journal of Magnetic Resonance - Series A.