[1. Altshuler, B., Yannus, L., Palmes, E. D., and Nelson, N.: A. M. A. Arch. Ind. Hlth. 1.5 (1957) 293.]Search in Google Scholar
[2. Brown, T. H., Cook, K. M., Ney, F. G., and Hatch, T.: Am. J. Publ. Hlth. 40 (1.950) 450.10.2105/AJPH.40.4.450152847318017198]Search in Google Scholar
[3. Dautrebande, L., Beckmann, H., and Walkenhorst, W.: Staub 21 (1961)141.]Search in Google Scholar
[4. Dautrebande, L., and Walkenhorst, W.: Arch. Int. Phannacodyn. 1.62 (1966) 194.]Search in Google Scholar
[5. Davies, C. N.: Letter toEd., B. M.J., 1957, 17th August, pp. 410.10.1136/bmj.2.5041.410-b]Search in Google Scholar
[6. Dennis, W. L., and Sawyer, K. F.: Proton. Tech. 1950, Paper No. 190.]Search in Google Scholar
[7. Findeisen, W.: Pfliigers Arch. Ges. Physiol. 236 (1935) 367.10.1007/BF01752351]Search in Google Scholar
[8. Fuchs, N.: Phys. Z. Sovjet. 6 (1.934) 224.]Search in Google Scholar
[9. Keith, C. H., and Derrick, J. C.: J. Coli. Sci. 1.5 (1960) 340.]Search in Google Scholar
[1.0. Landahl, H. D., and Hernnan, R. G.: J. Industr. Hyg. 30 (1948} 181.]Search in Google Scholar
[11. Landahl, H. D., Tracewell, T. N., and Lassen, W. H.: A. M. A. Arch. Industr. Hyg. 3 (1951) 359.]Search in Google Scholar
[12. Maxwell, F. C.: Scientific Papers (Camb. Univ. Press) 2 (1890) 639.]Search in Google Scholar
[13. Proetz, A. W.: Applied Physiology of the Nose, St. Louis. Annals, 1953.]Search in Google Scholar
[14. Verzar, F., Hiigin, F., and Massion, W.: Pflügers Arch. Ges. Physiol. 261 (1955) 219.10.1007/BF0036389413266505]Search in Google Scholar
[15. Weibel, E. R.: Handbook of Physiol., Am. Physiol. Soc., Sec. 3, Respiration 1 (1964) 320.]Search in Google Scholar
[16. Van Wijk, A. M., and Patterson, H. S.: J. lndustr. Hyg. 22 (1940) 31.]Search in Google Scholar
