I don't know German so preferably I need some primary sources that have English translations alongside the originals. As you probably can guess, this is for a History term paper. I've been fascinated with this topic and I'm hoping to show how Nazi Germany's early euthanasia and eugenics policies helped to foster the mindset that would eventually lead to the Final Solution. Of course my thesis may change or modify as I interact with both primary and secondary sources.
Many thanks.
Start with the United States Holocaust Memorial Museum (USHMM). They have a large collection of online sources that have been translated.