Minecraft wiki entry for 1.2, associated text: Bedrock Edition 1.4.0 betas
Bedrock Edition beta 1.2.13.8
Bedrock Edition beta 1.2.13.10
Bedrock Edition beta 1.2.13.11
Bedrock Edition beta 1.2.13.12
Bedrock Edition beta 1.2.14.2
Bedrock Edition beta 1.2.14.3
Bedrock Edition beta 1.2.20.1
Bedrock Edition beta 1.2.20.2