Text ( visual ) : unmediated Test methods, specifications and standards. -- Washington, D.C. : Natoinal Academy of Sciences , 1979. -- 99 p. : ill. ; 24 cm. -- (Fire safety aspects of polymeric materials ; v. 2). -- (BA13054185) ; https://ci.nii.ac.jp/ncid/BA13054185 Author Heading(s): National Research Council (U.S.). National Materials Advisory Board