Manchuria-U.S.S.R. boundary
CIA
<p>Library of Congress Geography and Map Division Washington, D.C. 20540-4650 USA 
</p>
DIGITAL ID g7822m ct002999 <a rel="nofollow" class="external free" href="http://hdl.loc.gov/loc.gmd/g7822m.ct002999">http://hdl.loc.gov/loc.gmd/g7822m.ct002999</a>