diff --git a/.gitignore b/.gitignore
index 5532a0e..1d805d2 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,4 @@
 marc.pl
 other/
+*.xml
+*.iso2709
diff --git a/build.pl b/build.pl
index 02ef90c..cc3257d 100755
--- a/build.pl
+++ b/build.pl
@@ -3,6 +3,8 @@
 use utf8;
 binmode(STDOUT, ":utf8");
 
+my @chars = ("A".."Z", "a".."z", "1".."9", "_");
+
 $/ = "</dublin_core>\n"; # record separator
 
 $what = 1000; # dummy id for when there’s no file
@@ -35,8 +37,10 @@ while (<>) {
 		#$cul =~ s@.*(folders/|d/)([^?&/]+).*@\2@;
 		$cul =~ s@.*(d/)([^?&/]+).*@$2@;
 		$tac = "https://drive.google.com/uc?export=download&id=$cul";
-    		print "$tac\n";
-    		print "\n";
+	} elsif ($cul =~ /pdf/ && $cul =~ /usi/) {
+		$tac = $cul;
+		$cul = '';
+		$cul .= $chars[rand @chars] for 1..33;
 	}
         $path = '';
 	$id = $what++;
@@ -57,14 +61,13 @@ while (<>) {
     print DC $_;
     close DC;
 
-    # assuming we have a file ...
     if ($tac) {
 	print "$tac\n";
 	print "$cul\n";
 
 	my $duplicated = `grep -o \"$url\" $file | wc -l`;
 	if ($duplicated > 1) {
-		print "DUPLICATED";
+		print "DUPLICATED\n";
 		next;
 	}
 
@@ -72,7 +75,7 @@ while (<>) {
 	#system "curl -s -L \"$tac\" -o import/$id/$cul";
 
 	my $output = `file import/$id/$cul`;
-	print $output;
+	print "$output\n";
 
 	$ext = '';
 
@@ -98,4 +101,7 @@ while (<>) {
     }
 }
 
+print "eliminamos $id\n";
+system "rm -rf import/$id";
+
 __END__
diff --git a/download-files.sh b/download-files.sh
new file mode 100644
index 0000000..6e7f219
--- /dev/null
+++ b/download-files.sh
@@ -0,0 +1,38 @@
+#!/bin/sh
+
+cd "$1"
+
+start="$2"
+end="$3"
+for i in $(seq $start $end); do
+    cd "$i"
+    cat dublin_core.xml | grep -Eo "(http|https)://[a-zA-Z0-9./?=_%&;:-]*" | sort -u | while read url; do
+        filename="$(cat /dev/urandom | gtr -dc 'a-zA-Z0-9_' | fold -w 32 | head -n 1)"
+
+	echo "$url"
+	if echo "$url" | grep -q -e "file\|docs"; then
+		id="$(echo "$url" | sed -r 's@.*(d/)([^?&/]+).*@\2@')"
+		url="https://drive.google.com/uc?export=download&id=$id"
+	fi
+
+        curl -L "$url" -o "$filename"
+
+	ext=""
+	output="$(file $filename)"
+	if echo $output | grep -q PDF; then
+		ext="pdf"
+		mv $filename $filename.pdf
+	fi
+	if echo $output | grep -q Word; then
+		soffice --headless --convert-to pdf $filename;
+		mv $filename $filename.docx;
+		ext="word"
+	fi
+
+	if [ "$ext" = 'pdf' ] || [ "$ext" = 'docx' ]; then
+		printf "$filename.pdf" | tee -a contents
+		[ $ext = 'docx' ] && printf "$filename.docx" | tee -a contents
+	fi
+    done
+    cd ..
+done
diff --git a/marc2dc.pl b/marc2dc.pl
index e8846b2..0f09a54 100755
--- a/marc2dc.pl
+++ b/marc2dc.pl
@@ -40,6 +40,12 @@ while (my $blob = <>) { # suck in one MARC record at a time
                         $element = 'contributor';
                         $qualifier = 'author';
                 	$content =~ s/[0-9]//g;
+			$content =~ s/comp\.//g;
+			$content =~ s/col\.//g;
+			$content =~ s/dir\.//g;
+			$content =~ s/pról\.//g;
+			$content =~ s/coord\.//g;
+			$content =~ s/ed\.//g;
 			$content =~ s/^\s+|\s+$//g;
 		}
                 if ($element eq 'format') {