By Maule R   Schacher G   Gallup S   in Internet Research: Electronic Networking Applications and Policy

ISSN:1066-2243|12|5|427-435

Emerald Group Publishing Ltd‎(2002)‎

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By Ilfeld R.M.   Schacher G.P.   in Bulletin (Society for Applied Spectroscopy)

ISSN:0096-8706|5|4|13-18

Society for Applied Spectroscopy‎(1951)‎

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