Item does not have a license for document <strong xmlns="http://eprints.org/ep3/issues">

<!-- document citation -->


<span xmlns="http://www.w3.org/1999/xhtml" xmlns:cite="http://eprints.org/ep3/citation" xmlns:epc="http://eprints.org/ep3/control" class="ep_document_citation">
<a class="ep_document_link" href="https://pure.iiasa.ac.at/id/eprint/1550/1/RR-81-018.pdf"><span class="document_format">Text</span></a>
<br/><span class="document_filename">RR-81-018.pdf</span>



</span>

</strong>