"Il Gas Interale" S.p.A.
.ANG.hman Stefan
A/S Niro Atomizer
ABB Environmental Systems Division of ABB Flakt, Inc.
ABB Flakt Industri AB
Ahland Erwin
Ahman Stefan O. H.
AirPol, Inc.
Allegheny Energy, Inc.
Alonso Martínez Fernando
Alppi Hannu
Amarasekera Jayantha
American Electronic Laboratories, Inc.
Ancheyta Juárez Jorge
Andersen 2000 Inc.
Andreasen Jens
Anhydro A/S
Annesser Richard J.
Anthony Jospeh D.
Ashley Michael J.