url(r'^$', 'main_view', name='libraries_main_view'),
     url(r'^/$', lambda x: HttpResponseRedirect(x.path[:-1])),
     url(r'^/(?P<slug>[a-zA-Z0-9_-]+)$', 'catalog_view', name='libraries_catalog_view'),
+    url(r'^/(?P<catalog_slug>[a-zA-Z0-9_-]+)/(?P<slug>[a-zA-Z0-9_-]+)$', 'library_view', name='libraries_library_view'),
 )
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