Hi Lambchop and welcome to Rootschat!
I love your username - when I was a youngster I LOVED Shari Lewis and Lambchop...Yvonne, that piccie brings back some memories!
I posted some answers to a similar question yesterday, about removing photos from old album pages. There are also, as Jim mentions, some topics at the top of this board about conservation of your treasures. Have a look through the threads here:
http://www.rootschat.com/forum/index.php/topic,66915.0.htmlThe adhesive is probably either animal/hide glue, rubber cement, or flour/starch paste. If you can see any of it at all, and it's yellow or orange, then it's one of the first two. It goes quite dry and crumbly when it's old, so if you're lucky the cards might pop off the page without too much coaxing.
What sort of paper are the pages made from? is it thinnish, or thick? If thin, and there's nothing on the other side, you could try removing the paper by placing the card face down on a flat surface, and then putting a damp (not wet) folded-up tea towel or face washer on the paper side (which should be facing up). Leave it there for a while (it might take 10 minutes or an hour, so keep checking) and hopefully the paper will gradually soften enough for you to gently lift or scrape it away with a blunt butter knife or very thin letter opener.
If you are concerned you're going to damage them more than you would like to, then I recommend taking them to a conservator who will be able to remove them relatively easily for you.
Hope that helps
Prue