Permafrost  Fouth International Conference, proceedings July 17-20, 1983 
organized by University of Alaska and National Academy of Sciences. 
 - Washington, D. C.  National Academy Press  1983. 
 - 1524 pages. : illustrations. 29 cm. 
<br/><br/><label>ISBN: </label>1030903453 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Frozen ground--Congresses