1. American Conference of Governmental Industrial Hygienists,1966
2. American Conference of Governmental Industrial Hygienists;API Toxicological Reviews; Threshold limit values for air-borne contaminants,1968
3. Battig, K., Grandjean, E., Rossi, L., and Rickenbacher, J. (1958).
4. The toxicity of precipitated silica;Byers, P.D.; Gage, J.C.;Brit. J. industr. Med,1961
5. The toxicity of butyl cellosolve solvent;Carpenter, C.P.; Pozzani, U.C.; Weil, C.S.; Nair, J.H.; Keck, G.A.; Smyth, Jr, H.F.;Arch. industr. Hlth,1956