J. D. Callahan

Node—based dynamic adaptive grid with quadrilateral and hexahedral elements

G. H. Wang, J. M. Tyler, J. S. Weltman, 1999 .

Temporal changes in metal levels of the lichens Parmotrema praesorediosum and Ramalina stenospora, Southwest Louisiana

John C. Young, J. D. Callahan, J. Beck, 1990 .

Three-Dimensional Parallel Finite Element Simulation of Natural Gas Flow in a Porous Media.

James David Callahan, John M. Tyler, J. D. Callahan, 1998 .

The identification of point sources of heavy metals in an industrially impacted waterway by periphyton and surface sediment monitoring

John C. Young, J. D. Callahan, J. Beck, 1992 .