1. Incorporating viral marketing elements Collection: Agricultural Communications Documentation Center (ACDC) Format: Journal article Publication Date: 2005 Published: USA: Agricultural Relations Council Location: Agricultural Communications Documentation Center, Funk Library, University of Illinois Box: 146 Document Number: C23226 Journal Title: ARCLight Notes: Reports on a campaign, "The Attack of the Mutant Artificial Trees," sponsored by the National Christmas Tree Association to encourage consumers to buy real trees.