http://pec.lib.wvu.edu/record/P194651946A Graphical form for applying the rosin and rammler equation to the size distribution of broken coal.<p> Serial issue. Issued as: United States. Bureau of Mines. <em>Information circular</em>, 7346 (1946:Feb.).</p>Landers, W. S. (William Samuel), 1913-Coal--Research.14256