1[1]Keller BW,Hajjeh R,Maria AD,et al.Community outbreak of Legionnaires' disease:An investigation confirming the potential for cooling tower to transmit Legionella species.ClinInfectDis,1996,22:257-261.
2[2]ASHRAE Guideline 12-2000 Minimizing the risk of legionellosis Associated with building water systems.
3[3]ASHRAE Standard 147-2002 Reducing the release of halogenated refrigerants from refrigerating and air-conditioning equipment and systems.
4[4]ANSI/ASHRAE Standard 15-2001 Safety standard for Refrigeration systems.
8[10]Mcdade JE,Shepard CS,Fraser DW,et al.Legionnaires'.disease:isolation of abacterium and demonstration its role inother respiratory disease.N EnglMed,1997,297:1197.
9[11]Keller BW,Hajjeh R,Maria AD,et al.Community outbreak of Legionnaires,diseese 1998,22:257-261.