OK, so my father just gave me a large collection of stamps, mostly US
but not all. I know there are some rare stamps in there, although i
won't mention them, but they are not preserved well. Some are in books
with those stinky little tabs. The majority are in yellowing clear type
envelopes. Thousands of them. He has had them for almost 50 years, and
they were old when he got them. Plate blocks, and blocks of 4, singles,
etc. What do I need to do? What supplies do I need to get? All I know
is that these things need help. It's a big collection.

Thanks. Ted.