anchor.diff:  
             <p class='credits'><strong>Suggested citation for data as displayed on GFW:</strong> Hansen, M. C., P. V. Potapov, R. Moore, M. Hancher, S. A. Turubanova, A. Tyukavina, D. Thau, S. V. Stehman, S. J. Goetz, T. R. Loveland, A. Kommareddy, A. Egorov, L. Chini, C. O. Justice, and J. R. G. Townshend. 2013. “Tree Cover Extent.” University of Maryland, Google, USGS, and NASA. Accessed through Global Forest Watch on [date]. <a href='http://www.globalforestwatch.org' target='_blank'>www.globalforestwatch.org</a>.</p>
   
  -          <p class='read_more hidden'><em><%= link_to 'Learn more or download data', "#{sources_path}/forest_cover" %></em></p>
  +          <p class='read_more hidden'><em><%= link_to 'Learn more or download data', "#{sources_path}/forest_cover?t=forest2000" %></em></p>
           </div>
         </div>
       </li>
  
positive.code: 
            <p class='credits'><strong>Suggested citation for data as displayed on GFW:</strong> “Mining.” World Resources Institute. Accessed through Global Forest Watch on [date]. <a href='http://www.globalforestwatch.org/' target='_blank'>www.globalforestwatch.org</a>.</p>
  
            <p class='read_more hidden'><em><%= link_to 'Learn more or download data', "#{sources_path}#forest_use" %></em></p>
          </div>
  
          <div class='source_extended'>
  
negative.code: 
            <p class='credits'><strong>Suggested citations for data as displayed on GFW:</strong> Hansen, M. C., P. V. Potapov, R. Moore, M. Hancher, S. A. Turubanova, A. Tyukavina, D. Thau, S. V. Stehman, S. J. Goetz, T. R. Loveland, A. Kommareddy, A. Egorov, L. Chini, C. O. Justice, and J. R. G. Townshend. 2013. “Hansen/UMD/Google/USGS/NASA Tree Cover Loss and Gain Area.” University of Maryland, Google, USGS, and NASA. Accessed through Global Forest Watch on  [date]. <a href='http://www.globalforestwatch.org' target='_blank'>www.globalforestwatch.org</a>.</p>
  
            <p class='read_more hidden'><em><%= link_to 'Learn more or download data', "#{sources_path}/forest_change?t=umd_tree_loss_gain" %></em></p>
          </div>
        </div>
      </li>
  