%0 Journal Article %T In vitro toxicity of respirable-size particles of diatomaceous earth and crystalline silica compared with asbestos and titanium dioxide. %A Hart, G A %A Hesterberg, T W %J Journal of occupational and environmental medicine %V 40 %N 1 %P 29-42 %@ 1076-2752 %D 1998-03-27 %~ DeepDyve