Last update: Thu Sep 27 02:41:24 MDT 2018
@Article{Janssen:1948:BC, author = "Raymond E. Janssen", title = "The Beginnings of Coal", journal = j-SCI-AMER, volume = "179", number = "1", pages = "46--51", month = jul, year = "1948", CODEN = "SCAMAC", DOI = "https://doi.org/10.1038/scientificamerican0748-46", ISSN = "0036-8733 (print), 1946-7087 (electronic)", ISSN-L = "0036-8733", bibdate = "Sat May 18 16:11:52 MDT 2013", bibsource = "http://www.math.utah.edu/pub/tex/bib/sciam1940.bib", URL = "http://www.nature.com/scientificamerican/journal/v179/n1/pdf/scientificamerican0748-46.pdf", acknowledgement = ack-nhfb, fjournal = "Scientific American", journal-URL = "http://www.nature.com/scientificamerican", keywords = "Carboniferous period; coal; flora; fossil; Mississippian period; Pennsylvanian period; tropical flora", }