If you wish to use the information, then just make sure you put the information entirely in your own words. You should mention where you obtained the information. That's all. I worked in that area of expertise.
You can of course transcribe the words exactly as you read them and note that it is your own transcription, and then cite your source
You can of course write to the copyright holder and ask permission to quote them.
Cheers, JM (I am in NSW Australia, and I am used to dealing with copyright matters re manuscripts and maps and plans in respect of Australian Copyright laws).
