A 5.25 inch floppy disk containing the source of all Fortran-77 routines needed is included with the text. These Fortran subroutines represent state of the art mathematical software. The routines are well written, documented, and used worldwide (because of their robustness and ease of application). They appear in collections such as Linpack, Quadpack, Minpack, SLATEC, and others, which are known and used throughout the scientific community.