- On Austrian Soil: Teaching Those I Was Taught To Hate by Sondra Perl,  2005-03-10
 - Randal Schwartz's Perls of Wisdom by Randal Schwartz, Apress,  2004-12-14
 - Practical Text Mining with Perl (Wiley Series on Methods and Applications in Data Mining) by Roger Bilisoly,  2008-08-18
 - Perl: Annotated Archives by Martin C. Brown,  1999-01-07
 - Perl Programming for Medicine and Biology (Series in Biomedical Informatics) by Jules J. Berman,  2007-04-06
 - Analyzing Computer System Performance with Perl::PDQ by Neil J. Gunther,  2010-11-02
 - Perl 6 and Parrot Essentials, Second Edition by Allison Randal, Dan Sugalski, et all  2004-06
 - Wicked Cool Perl Scripts: Useful Perl Scripts That Solve Difficult Problems by Steve Oualline,  2006-02-15
 - Pro Perl by Peter Wainwright,  2005-03-24
 - Genomic Perl: From Bioinformatics Basics to Working Code by Rex A. Dwyer,  2002-07-15
 - Gestalt Therapy by Frederick Perls,  1951
 - Gestalt Therapy: Excitement and Growth in the Human Personality by M.D., Ph.D. Frederick S. Perls, Ph.D. Ralph F. Hefferline, et all  1994-02-10
 - Advanced Perl Programming by Sriram Srinivasan,  1997-08
 - Network Programming with Perl by Lincoln D. Stein,  2001-01-06
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