TY - CPAPER AU - C. G. Olmedo AU - E. Q. AragСѓn AU - J. G. Torrent AU - L. M. Pejic AU - C. F. RamСѓn TI - STUDY OF POROSITY AND PERMEABILITY OF AIR FILTER MATERIAL IN RESPIRATORY PROTECTION FILTERS T2 - 8th International Scientific Conference - SGEM2008 PY - 2008 SP - 231 EP - 240 PB - SGEM Scientific GeoConference ER -