Natural Adabas Programming

Hello, it was a system that I programmed for approximately 15 years in Adabas Natural in large companies (oil, aluminum), but for more than 12 years that I have not done it, now I need to program in Natural Adabas and I urgently require a manual to refresh my knowledge and put them to production, can you help me to find a Natural Adabas Programming?

Here is the link to documentation for Community members: http://techcommunity.softwareag.com/ecosystem/documentation/