Numerical Recipes /star/local/src/recipes_c-ansi/ with the source code being in the "recipes" directory there... when you compile them you also need various include files (e.g. nrutil.h) which are in the "include" directory. NR routines often also call an "error" routine in the event of an error, you can usually either hack that out of the code or else include the error code as well.. ask me if it's not clear what to do...