Scala di Ringelmann (Italian Wikipedia)

Analysis of information sources in references of the Wikipedia article "Scala di Ringelmann" in Italian language version.

refsWebsite

Global rank Italian rank

882^nd place

2,321^st place

epa.gov

Karen Randolph, Visible Emissions Field Manual EPA Methods 9 and 22 (PDF), su epa.gov, United States Environmental Protection Agency, 3 febbraio 2012. URL consultato il 20 aprile 2013.