Author & Contributor Index
- Illinois Waste Management and Research Center (WMRC)
- Illinois Waste Management Research Center
- Illinois Wesleyan University
- Illinois. Zoning Laws Study Commission
- Illiois Heritage Association
- Illiois State Academy of Science
- Illlinois State Water Survey,
- Illustration: Bernardi, Lucia
- Illyes, Robert F.
- ILO Subregional Office for Central and Eastern Europe
- Ilseman, Michael
- Ilundain-Agurruza, Jesus Maria
- Ilusby, Ralph D.
- Ilyas, Ihab F.
- Ilyas, Mohammad Bashir
- Ilyushin, V.
- Imaad, Syed M.
- Imai, Brian
- Imai, Mutsumi
- Imane, Haykal
- Imarenezor, Osazomon
- Imbeault, Fernand Adelard
- Imberman, Angela
- Imbriale, William Anthony
- Imburgia, Samantha
- Im, Chung-in
- Imdieke, Leroy Francis
- Imer, Orhan C.
- Imhoff, Brian John
- Imhof, Violet Ilene
- Imig, David Gregg
- Imir, Ozan Berk
- Im, Jane
- Imker, Heidi
- Imker, Heidi J
- Imker, Heidi J.
- Im, Kwaifong Eastwood
- Imlay, Hannah N.
- Immaneni, Aravind
- Im, Mee Seong
- Immler, Frank
- Imoka, Chizoba
- Impens, William Francis
- Imperial, Robert
- Imperial Valley Water Authority
- Imran, Mohiuddin
- Imroz, SM
- Imroz, S.M.
- Imroz, Sohel M.
- Im, Seyoung