Last update: Wed May 9 02:04:59 MDT 2018
@Article{Howard:1967:RE, author = "Thomas E. Howard", title = "Rapid Excavation", journal = j-SCI-AMER, volume = "217", number = "5", pages = "74--85", month = nov, year = "1967", CODEN = "SCAMAC", DOI = "https://doi.org/10.1038/scientificamerican1167-74", ISSN = "0036-8733 (print), 1946-7087 (electronic)", ISSN-L = "0036-8733", bibdate = "Sat May 18 15:58:56 MDT 2013", bibsource = "http://www.math.utah.edu/pub/tex/bib/sciam1960.bib", URL = "http://www.nature.com/scientificamerican/journal/v217/n5/pdf/scientificamerican1167-74.pdf", acknowledgement = ack-nhfb, fjournal = "Scientific American", journal-URL = "http://www.nature.com/scientificamerican", }