Sloppy photographic reproduction,
Von Amazon bestätigter Kauf(Was ist das?)
Rezension bezieht sich auf: Asymptotic Expansions of Integrals (Dover Books on Mathematics) (Taschenbuch)
This Dover reprint comes complete with someone's handwritten annotations and underscorings, as can be seen already on p.2. See also p. 9, 12, etc. Essentially all the bibliographies of the chapters come with hooks, cf. e.g. p.40. I think Dover is overdoing it with the careless photographic reproduction.
Of course this is still a very useful book.