id	author	title	date	pages	extension	mime	words	sentence	flesch	summary	cache	txt
ap-1961	Erlykin, Anatoly D.; Wolfendale, Arnold W.	DO WE SEE THE ‘IRON PEAK’?	2013	4	.pdf	application/pdf	2722	172	73	[3] Apel W.D. et al., 2009, Astropart. Cosm.Ray Conf., Beijing, 1, 209 [5] Berezhnev S.F.et al., 2011b, 32nd Int.	cache/ap-1961.pdf	txt/ap-1961.txt