In a reference, the pages of an article or analogous subdocument in which a publication resides. Specified as a sequence of two integers.
(=> (Ref.Pages ?Ref ?Page-Range) (And (Or (Book-Section-Reference ?Ref) (Article-Reference ?Ref) (Proceedings-Paper-Reference ?Ref)) (Integer (First ?Page-Range)) (Integer (First (Rest ?Page-Range)))))