Text ( visual ) : unmediated Trends in technology-intensive trade / [C. Michael Aho and Howard F. Rosen]. -- Springfield : U.S. Department of Commerce, National Technical Information Service, 1980. -- iii, 60 p. ; 28 cm. -- "PB81-181224" ; Reprint. Originally published: Washington, D.C.: Bureau of International Labor Affairs ; NTIS report. -- (BA3253010X) ; https://ci.nii.ac.jp/ncid/BA3253010X Author Heading(s): Aho, C. Michael ; Rosen, Howard F. ; United States. Bureau of International Labor Affairs. Office of Foreign Economic Research