ISBN 9781288755660 books & textbook
The U.S. Geological Survey Modular Ground-Water Model PCGN: A Preconditioned Conjugate Gradient Solver with Improved Nonlinear Control: USGS Open-File Report 2008-1331
Naff, Richard L. Banta, Edward R. U.S. Department of the Interior, United
BiblioGov /2013-02-11 Paperback / 48 Pages
isbn-10: 128875566X / isbn-13: 9781288755660
