GitHub - OpenDrupal/opendrupal-drupal-module-development: Materials for a Drupal 8 course on module development.
GitHub - PacktPublishing/Drupal-8-Module-Development-Second-Edition: Drupal 8 Module Development - Second Edition, published by Packt
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Drupal 8 Module Development: 18 Best Practices to Follow (That Most Drupal Developers Seem to Agree Upon) | Adrian ABABEI - Drupal Developer
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