PHP error happened

Technical information
Error type2
Error descriptionCannot modify header information - headers already sent by (output started at /home/gblalock/public_html/comppile/books/include/locale.php:1749)
URLcomppile.org/books/usup_export.php?
Error file/home/gblalock/public_html/comppile/books/usup_export.php
Error line137
SQL querySELECT ID_user, `_timestamp`, id, author, title, `date`, book, journal, pages, keywords, annotation FROM comppile_main where book='Logan, UT: Utah State University Press' AND date >= 2009