How do I import exported accounts?

[Robert Smits]

I use Gnucash to track finances, including donations, for a political party.

I keep a separate set of books for an election camapign. 

I need to find a way to export my income/contribution accounts with several 
hundred names and then import the same accounts into the riding account to 
avoid having to re-enter them all.

I see how to export them, from the but how do I import them into my riding 
account?

Thanks, Bob