how to determine 51 bowman and 48 leaf reprints

[hcv123]

I have an opportunity to purchase some early cards including 1933 Goudey, 1948 leaf baseball, 1948 leaf football, 1951 bowman baseball, 1949 bowman baseball, 1948 bowman football. I have handled many cards from the 50's-70's. I know that many of the sets being offered have been reprinted/counterfeited. I am looking for information/input on how to tell the real ones from the fake ones in the sets I mentioned above. Thanks.

Howard

[almostdone]

Howard,
Are the cards you are looking at able to be looked at by you in person or is it a lot that would be viewed over the internet, ie eBay?
Drew