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Learning Drupal 6 Module Development: A practical tutorial for creating your first Drupal 6 modules with PHP: Butcher, Matt: 9781847194442: Amazon.com: Books
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Add options to system menu block so primary and secondary menus can be blocks rather than variables [#474004] | Drupal.org
![Learning Drupal 6 Module Development: A practical tutorial for creating your first Drupal 6 modules with PHP: Butcher, Matt: 9781847194442: Amazon.com: Books Learning Drupal 6 Module Development: A practical tutorial for creating your first Drupal 6 modules with PHP: Butcher, Matt: 9781847194442: Amazon.com: Books](https://images-na.ssl-images-amazon.com/images/I/51izWK2HKIL._AC_SY200_QL15_.jpg)