The New Encyclopaedia Britannica, Volume 13Encyclopaedia Britannica, 1974 - Encyclopedias and dictionaries |
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acid Africa agricultural Algeria Almoravids American antimony Arab Arctic arsenic atoms Basin became Berber bismuth bonds British central centre century Christian coast coastal compounds culture early east eastern economic elected electrons elements energy European feet fiction fission forest French fuel groups Hausa hydrogen important Indians industry Islām Island isotopes known Lake land languages Maghrib magnetic major Maori mass ment metal Mexico molecules Morocco mountains Muslim neutrons nickel Niger Nigeria Nile nitrogen nitrogen group North America northern Northwest Norway novel novelists nuclear nuclear fission nucleotides nucleus Orleans oxide percent period phosphorus Plains plasma Plateau plutonium political population ports production province reaction reactor region River Roman schools settlement Shoshoni social southern Spanish square miles structure Sudan temperatures territory tion towns trade traditional tribes Tunisia United uranium Valley western xenon York Zealand