Help with grains in old wine recipes. You will have better knowledge than us winos. Thanks in advance

Posted links to some old recipes for wines from the 70s that I have inherited. As wine makers we don't know about grains but hoping you guys might.

http://imgur.com/a/6xxPg

Just wondered what the grains like barley and rice was doing as a process and as a flavour and thought you guys could advise.

As a wine maker I have little knowledge of brewing terms so talk slow to me!!!

Thanks.