References

1. Kernighan, B. W., and D. M. Ritchie, The C programming language, 2nd edition, p. 272, Prentice-Hall, Englewood Cliffs, New Jersey, 1988.

2. Adobe Systems Inc., PostScript Language Reference Manual, 2nd edition, p. 764, Addison-Wesley, Reading, Massachusetts, 1990.

3. Lewine, D., POSIX programmer's guide, 1st edition, p. 607, O'Reilly & Associates, Sebastopol, California, 1991.

4. Treinish, L. A., and M. L. Gough, A software package for the data-independent management of multidimensional data, EOS trans. AGU, 68, 633-635, 1987.

5. Smith, W. H. F., and P. Wessel, Gridding with continuous curvature splines in tension, Geophysics, 55, 293-305, 1990.

6. Wessel, P., and W. H. F. Smith, New, improved version of Generic Mapping Tools released, EOS trans. AGU, 79, 579, 1998.

7. Wessel, P., and W. H. F. Smith, New version of the Generic Mapping Tools released, EOS trans. AGU, 76, 329, 1995a.

8. Wessel, P., and W. H. F. Smith, New version of the Generic Mapping Tools released, EOS electronic supplement, http://www.agu.org/eos_elec/95154e.html, 1995b.

9. Wessel, P., and W. H. F. Smith, Free software helps map and display data, EOS trans. AGU, 72, 441 & 445-446, 1991.