Reference ; NBS PUBLICATIONS NBSIR 84-3011 NAT'L INST. OF STAND & TECH AlllDb 33 7 5 THERMAL AND MECHANICAL PROPERTIES OF POLYURETHANE FOAMS AND A SURVEY OF INSULATING CONCRETES AT CRYOGENIC TEMPERATURES National Bureau of Standards U.S. Department of Commerce Boulder, Colorado 80303 April 1984 - : C 100 . U56 34-3011 1934 v