Physical description for original version: iii, 39 p. : 28 cm
書誌注記
Includes bibliographical references (p. 31-34)
原資料等に関する注記
原資料の出版事項: Boulder, Colo. ; Washington, DC : U.S. Dept. of Commerce, National Institute of Standards and Technology : For sale by the Supt. of Docs., U.S. G.P.O., 1990