Batch Download Pictures From Website

I'm trying to download big images from this site http://www.pintura.aut.org, and the list of peinters:http://www.pintura.aut.org/SearchAutor? ... inLimite=1, with the link http://imagen.aut.org/4DPict?file=20&rec=27.652&field=2, for the last image to this other, for the first image: http://imagen.aut.org/4DPict?file=20&re ... 22&field=2, but can't seem to get it download any of the images except thumbnails. Thanks for any help. Thanks for any help.
I tried http://imagen.aut.org/4DPict?file=20&rec=[27.652-115.322]&field=2 but it doesn´t work. Sorry for my bad english.

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The liks of images in this url : http://www.pintura.aut.org/SearchAutor? ... inLimite=1, doesn,t work. Please help me .
The next link is :
http://www.pintura.aut.org/SearchAutor?Autnum=16.575, and javascript:vpintura('/SearchProducto?Produnum=115322'), and the next
http://www.pintura.aut.org/SearchProduc ... num=115322, and the link to the image: http://imagen.aut.org/4DPict?file=20&re ... axsize=400, and to the big image:
http://imagen.aut.org/4DPict?file=20&re ... 22&field=2, this is for the first image for the last : http://imagen.aut.org/4DPict?file=20&rec=27.652&field=2. I tried to put sequential number, [27.652-115.322] but it doesn´t work. Thinks for your help.