wget http://s3.documentcloud.org/documents/719116/pages/doc03-p1-large.gif ... wget http://s3.documentcloud.org/documents/719116/pages/doc03-p52-large.gif
http://s3.documentcloud.org/documents/719116/doc03.pdf
Edit: well, I guess you didn't falsify any headers, though.
This make me depressed :/
wget http://s3.documentcloud.org/documents/719116/pages/doc03-p{1..52}-large.gif