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200 1 $aIntroduction to Gas Lasers$ePopulation Inversion Mechanims with Emphasis on Selective Excitation Processes$fby Colin S. Willett
210   $aOxford [etc.]$cPergamon Press$d1974
225 1 $aInternational series of monographs in natural philosophy$v67
610 0 $aLaser
610 0 $aElettronica quantistica
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700  1$aWillett,$bColin Sidney$0334710
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996   $aIntroduction to gas lasers$9117529
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