Deletion of Heritage site

Comment: It took me all of a minute to find a source which discusses the concept of a heritage site and explicitly differentiates it from that of a historic site: "http://books.google.co.uk/books?id=hfw3uJMT43EC&pg=PA219 Is a Heritage Site a Historic Site?".  |AFD is not cleanup so please follow 
Stance: keep
Cited policy: Wikipedia:Arguments to avoid in deletion discussions (WP:NOTCLEANUP||WP:BEFORE)