Picking Up Perl Copyright © 1998, 1999, 2001 Bradley M. Kuhn.
Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.1 or any later version published by the Free Software Foundation; with Invariant Sections being "The GNU Free Documentation License", with no Front-Cover Texts, and with no Back-Cover Texts. A copy of the license is included in the section entitled "GNU Free Documentation License" (see GNU Free Documentation License).