00000nam 2200000zi 4500 9.881341 CaOODSP 20221107170025 m o d f cr |n||||||||| 191029e19810315onc|||| ob f000 0|eng d CaOODSP eng rda CaOODSP n-cn--- Co24-355/1981E-PDF Petrie, L. E., author. Selection of a best frequency complement for HF communications / by L.E. Petrie. [Ottawa] : [Department of Communications], 15 March 1981. 1 online resource (1 volume (various pagings)) text txt rdacontent computer c rdamedia online resource cr rdacarrier Digitized edition from print [produced by Innovation, Science and Economic Development Canada]. "DOC Contract #OER80-00339." Includes bibliographical references (page 34). Radio frequency allocation Canada. Radio frequency modulation Testing. Radiofréquences Attribution Canada. Modulation de fréquence. Canada. Department of Communications. Petrie Telecommunications Limited. PDF 3.79 MB https://publications.gc.ca/collections/collection_2020/isde-ised/Co24/Co24-355-1981-eng.pdf