{{cite compare|mode=encyclopedia|encyclopedia=[[Encyclopedia of Arkansas History & Culture]]|title=Louisiana Purchase|first=Lea Flowers|last=Baker|accessdate=2010-09-18|url=http://encyclopediaofarkansas.net/encyclopedia/entry-detail.aspx?entryID=2383
]==]
}, {
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}, {
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{{cite compare | mode = encyclopedia | editor=Robert M. Besançon | encyclopedia=The Encyclopedia of Physics | edition=3rd | year=1990 | publisher=Van Nostrand Reinhold, New York | isbn = 0-442-00522-9 | pages = 1278–1284 | article=Vacuum Techniques
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{{Cite compare | mode = encyclopedia | last = McFarlane | first = Ian | authorlink = Ian McFarlane | encyclopedia = [[Encyclopedia of Australian Rock and Pop]] | title = Whammo Homepage | url = http://web.archive.org/web/20040405231007/www.whammo.com.au/index.asp | accessdate =4 December 2010 | year = 1999 | publisher=[[Allen & Unwin]] | ___location = [[St Leonards, New South Wales|St Leonards, NSW]] | isbn = 1-86508-072-1
