01173cam a2200301 a 4500001000800000005001700008007001400025008004100039035002000080035001200100040001300112074001900125086001900144091000800163245008800171260019000259300002200449490002600471500005500497500002000552504004900572536002600621650005200647700003200699710008000731830002700811984003300838405557420171213122820.0he bmb---bbca930612s1990 coua bbt f000 0 eng d a(OCoLC)28267102 a4055574 dGPOdDLC a0126-D-03 (MF)0 aC 60.10:90-268 amfm00aSpectrum required for HF broadcasting h[microform] /cJames Washburn ... [et al.]. a[Boulder, CO] :bU.S. Dept. of Commerce, National Telecommunications and Information Administration ;aSpringfield, VA :bFor sale by the National Technical Information Service,c[1990] aix, 91 p. :bill.1 aNTIA report ;v90-268 aDistributed to depository libraries in microfiche. a"October 1990." aIncludes bibliographical references (p. 33). aVOA/EOF.d1-910-5513. 0aShortwave radioxTransmitters and transmission.1 aWashburn, J. S.q(James S.)1 aUnited States.bNational Telecommunications and Information Administration. 0aNTIA report ;v90-268. aANLcmc SUDOC C 60.10:90-268