The Encyclopedia Americana, Količine 1–30Bernard S. Cayne Grolier, 1981 |
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19th century alpha particle American animals antenna atoms became beta particles body born British broadcasting called carrier wave cars cells Christian church color decay early eggs electric electrons energy England Europe example feet France freight French frequency gamma gamma rays German hertz human important Indian industry Island Italian Italy known land later major megahertz ment meters miles modern modulation Montreal neutrons North operating organized painting particles party plants political population produced programs pump puppets Puritans pyramid quasars Quebec Quebec City radar radiation radio radioactive radium rail railroads rays received Reformation refrigerant region religion religious Renaissance reptiles Republican Rhode Island River Roman signal snakes South southern species stations style theory tion tradition train transmitter United University usually waves World World War II X rays