You want to find all the links to Wikipedia? You could try Googling for 'Wikipedia'.
But in my experience of looking for links, it's impossible to get Google to show you a complete list of anything. It has this habit of deciding that enough is enough, you must be bored by now, you'd rather see something else.
It likes to think it's some sort of smart information browser, not just a dumb text search. It's especially averse to duplication, because it's sure you don't need to see the same thing twice.