Referred to POSIX docs as well as to Unix docs.
diff --git a/Doc/libposix.tex b/Doc/libposix.tex
index 97756c7..a32953d 100644
--- a/Doc/libposix.tex
+++ b/Doc/libposix.tex
@@ -18,9 +18,9 @@
when an entry is \code{os.environ} is changed.
\stmodindex{os}
-The descriptions below are very terse; refer to the
-corresponding \UNIX{} manual entry for more information. Arguments
-called \var{path} refer to a pathname given as a string.
+The descriptions below are very terse; refer to the corresponding
+\UNIX{} manual (or POSIX documentation) entry for more information.
+Arguments called \var{path} refer to a pathname given as a string.
Errors are reported as exceptions; the usual exceptions are given
for type errors, while errors reported by the system calls raise