<span class="mix_file"><a href="user/file/69/Release6_May_2012_p6.pdf" title="Rumen methanogen puzzle"><img src="images/icons/icon_pdf.gif" border="0" alt="pdf" vspace="1" width="16" height="16" align="absMiddle" /> Rumen methanogen puzzle</a> <span style="font-size: 80%">(0.68MB)</span></span>&#160;<br />
