.SH
References
.LP
.IP [1]
K. L. Thompson and D. M. Ritchie,
.ul
The
.ul
.UC UNIX
.ul
Programmer's Manual,
Bell Laboratories, 1978.
.IP [2]
B. W. Kernighan and D. M. Ritchie,
.ul
The C Programming Language,
Prentice-Hall, Inc., 1978.
.IP [3]
B. W. Kernighan,
.UC UNIX \& ``
for Beginners \(em Second Edition.''
Bell Laboratories, 1978.