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@Article{Schweickart:2003:STA, author = "Russell L. Schweickart and Edward T. Lu and Piet Hut and Clark R. Chapman", title = "Space Technology: The Asteroids Tugboat", journal = j-SCI-AMER, volume = "289", number = "5", pages = "54--61", month = nov, year = "2003", CODEN = "SCAMAC", DOI = "https://doi.org/10.1038/scientificamerican1103-54", ISSN = "0036-8733 (print), 1946-7087 (electronic)", ISSN-L = "0036-8733", bibdate = "Fri May 17 10:27:44 MDT 2013", bibsource = "http://www.math.utah.edu/pub/tex/bib/sciam2000.bib", URL = "http://www.nature.com/scientificamerican/journal/v289/n5/pdf/scientificamerican1103-54.pdf", acknowledgement = ack-nhfb, fjournal = "Scientific American", journal-URL = "http://www.nature.com/scientificamerican", }