Advanced Bird Language Part 1.0
Advanced Bird Language Part 1.1

Advanced Bird Language Part 2.0
Advanced Bird Language Part 2.1

Advanced Bird Language Part 3.0
Advanced Bird Language Part 3.1

Advanced Bird Language Part 4.0
Advanced Bird Language Part 4.1

Advanced Bird Language Part 5.0
Advanced Bird Language Part 5.1

Advanced Bird Language Part 6.0
Advanced Bird Language Part 6.1