http://digfir-published.macmillanusa.com/phelan_connectingbio/phelan_connectingbio_methane_ch10.html
Chapter
10. From Cow Manure to Electricity
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http://digfir-published.macmillanusa.com/phelan_connectingbio/phelan_connectingbio_methane_ch10_dlap.xmlDLAP questions515772eeb11c0fe323000003