Physical description for original version: 30 p. : 28 cm
書誌注記
Includes bibliographical references
原資料等に関する注記
原資料の出版事項: Gaithersburg, Md. ; Washington, D.C. : U.S. Dept. of Commerce, Technology Administration, National Institute of Standards and Technology : For sale by the Supt. of Docs., U.S. G.P.O., [2001]