As Heather J. Sharkey points out, Richard Leslie Hill felt this problem a long time ago, when he said in the preface to the second edition of his Biographical dictionary of the Sudan, "Little books are born in the Sudan by the dozen, without imprints without date, even without title page.
Heather J. Sharkey points out that Richard Leslie Hill already identified a problem with the lack of information about small books published in the Sudan, as he stated in the preface to the second edition of his Biographical dictionary of the Sudan: "Little books are born in the Sudan by the dozen, without imprints without date, even without title page."