Old Instructions - Your online source of Lego instructions, catalogues and ideas books from years pastOld Instructions | Your online source of Lego instructions, catalogues and ideas books from years past
history - What did Lego set instruction manuals look like in the past? - Bricks
LEGO® Classic toys - Free building instructions | Official LEGO® Shop US
Lego Space Instructions, Childrens toys
It amazes me that manuals of old sets do not have a list of the parts needed instead of "spot the differences" and good luck. not even highlighting the new parts. :