Buzbee, The SLATEC
common mathematical library, in Sources and Development of Mathematical Software, Wayne R.
Unfortunately, other versions of i1mach, such as those distributed with the slatec
library, have continued to interpret i1mach (6) as the number of chacters that fit into a Fortran integer.
Others that do include such programs are FN, IMSL, and SLATEC
, but they are all based on earlier work by Fullerton.