J. S. Shepard

Extended Drillpipe Life With Tighter Specifications

J. S. Shepard, 1992 .

One-point method for estimating furrow infiltration

Wesley W. Wallender, J. S. Shepard, Jan W. Hopmans, 1993 .

Electronic Identification of Drillstem and Other Components Used in Harsh Environments Proves Successful

J. S. Shepard, G. S. Perkin, L. A. Denny, 1993 .